<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2020 Workiva-->
<!--r:a026478a-968c-485a-ab46-f8ec3e520b9a,g:41101814-a5e4-40f4-923e-6d12bde3352b-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="avnw-20200703.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/DocumentandEntityInformation" xlink:type="extended" id="iccefb822e9d8433d99d52efd6ecf2eb7_DocumentandEntityInformation"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsOfOperations" xlink:type="simple" xlink:href="avnw-20200703.xsd#ConsolidatedStatementsOfOperations"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended" id="if74d382ba2a84ec38bc0a2b678e14c50_ConsolidatedStatementsOfOperations">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_24412714-5ac9-4951-8e89-36c1c95b8d94" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_RevenuesAbstract_24412714-5ac9-4951-8e89-36c1c95b8d94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_ecbb7814-a654-4124-856d-3e53cf46c966" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_24412714-5ac9-4951-8e89-36c1c95b8d94" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_ecbb7814-a654-4124-856d-3e53cf46c966" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_0a29f5b6-9f8b-4152-9d70-c566067cc4e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_0a29f5b6-9f8b-4152-9d70-c566067cc4e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_2f183af6-d223-41a3-98d8-f7d41be6ad88" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_0a29f5b6-9f8b-4152-9d70-c566067cc4e6" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_2f183af6-d223-41a3-98d8-f7d41be6ad88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_73086137-e168-4acc-b578-76afd329f6ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_GrossProfit_73086137-e168-4acc-b578-76afd329f6ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_be3134c0-430e-4592-8010-e6bbcf32555d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_OperatingExpensesAbstract_be3134c0-430e-4592-8010-e6bbcf32555d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_d921a898-29f6-4299-a9ad-080bf181c133" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_be3134c0-430e-4592-8010-e6bbcf32555d" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_d921a898-29f6-4299-a9ad-080bf181c133" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_60065b90-1097-4705-9402-0ab834a7e90d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_be3134c0-430e-4592-8010-e6bbcf32555d" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_60065b90-1097-4705-9402-0ab834a7e90d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_fc8e46b5-3df2-4bc5-a01a-7cb2a0d7e7e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_be3134c0-430e-4592-8010-e6bbcf32555d" xlink:to="loc_us-gaap_RestructuringCharges_fc8e46b5-3df2-4bc5-a01a-7cb2a0d7e7e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_e9e23448-0bdb-49d6-a951-987952c64aa1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_be3134c0-430e-4592-8010-e6bbcf32555d" xlink:to="loc_us-gaap_OperatingExpenses_e9e23448-0bdb-49d6-a951-987952c64aa1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_d699b8fe-dbed-48cc-85c4-67c39a538a99" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_OperatingIncomeLoss_d699b8fe-dbed-48cc-85c4-67c39a538a99" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_91442a7e-c386-46af-bc17-fda2d9b00c92" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_InvestmentIncomeInterest_91442a7e-c386-46af-bc17-fda2d9b00c92" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_c47a2e43-39de-4c58-b9ed-20ca29ce3a9a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_InterestExpense_c47a2e43-39de-4c58-b9ed-20ca29ce3a9a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_109e90cf-380b-4bd3-a686-9add3b08e3a6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_109e90cf-380b-4bd3-a686-9add3b08e3a6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6d4aec8d-32de-4e33-bd4a-e19b0b800ec3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6d4aec8d-32de-4e33-bd4a-e19b0b800ec3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_65228d1e-d816-4d22-acc5-b36aa6d4aa73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_65228d1e-d816-4d22-acc5-b36aa6d4aa73" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_ac334781-4313-42a7-a2ac-b42f5cd54f0a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_ProfitLoss_ac334781-4313-42a7-a2ac-b42f5cd54f0a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_72795614-8af5-406e-97d1-be82e00f8247" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_72795614-8af5-406e-97d1-be82e00f8247" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_d034e3ee-f44b-4873-baea-80453053458c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_NetIncomeLoss_d034e3ee-f44b-4873-baea-80453053458c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_e847a805-2827-4fe7-9c85-89c0caba09fe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_e847a805-2827-4fe7-9c85-89c0caba09fe" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_7de8540a-859c-46d8-b5ac-b9d7dd8ca397" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_e847a805-2827-4fe7-9c85-89c0caba09fe" xlink:to="loc_us-gaap_EarningsPerShareBasic_7de8540a-859c-46d8-b5ac-b9d7dd8ca397" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_f57b57cf-3d96-4fb0-9886-dd45a7484e44" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_e847a805-2827-4fe7-9c85-89c0caba09fe" xlink:to="loc_us-gaap_EarningsPerShareDiluted_f57b57cf-3d96-4fb0-9886-dd45a7484e44" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_6e106068-a568-445d-9639-7ae08f9809f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_6e106068-a568-445d-9639-7ae08f9809f8" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2cbddf57-9d54-4684-9c07-6ddf7d6f3b9e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_6e106068-a568-445d-9639-7ae08f9809f8" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2cbddf57-9d54-4684-9c07-6ddf7d6f3b9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_f0fcecf2-d5a9-433b-87dc-ef95adae3a8b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_6e106068-a568-445d-9639-7ae08f9809f8" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_f0fcecf2-d5a9-433b-87dc-ef95adae3a8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_0b48bf1e-a744-4f0b-82fb-2ba66669b0df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_47c94835-3c6d-4eeb-a836-059f5d11beca" xlink:to="loc_us-gaap_StatementTable_0b48bf1e-a744-4f0b-82fb-2ba66669b0df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_bee82174-5ba7-4ef1-850a-bc281b66625a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0b48bf1e-a744-4f0b-82fb-2ba66669b0df" xlink:to="loc_srt_ProductOrServiceAxis_bee82174-5ba7-4ef1-850a-bc281b66625a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_bee82174-5ba7-4ef1-850a-bc281b66625a_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_bee82174-5ba7-4ef1-850a-bc281b66625a" xlink:to="loc_srt_ProductsAndServicesDomain_bee82174-5ba7-4ef1-850a-bc281b66625a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_04ca0755-21cd-4935-9fb7-71e816d222f6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_bee82174-5ba7-4ef1-850a-bc281b66625a" xlink:to="loc_srt_ProductsAndServicesDomain_04ca0755-21cd-4935-9fb7-71e816d222f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_9453a090-f413-490a-8afe-14d112b0bb22" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_04ca0755-21cd-4935-9fb7-71e816d222f6" xlink:to="loc_us-gaap_ProductMember_9453a090-f413-490a-8afe-14d112b0bb22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_aa816491-6788-4f03-ba5f-5c14da8b50f3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_04ca0755-21cd-4935-9fb7-71e816d222f6" xlink:to="loc_us-gaap_ServiceMember_aa816491-6788-4f03-ba5f-5c14da8b50f3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsofComprehensiveLossIncome" xlink:type="simple" xlink:href="avnw-20200703.xsd#ConsolidatedStatementsofComprehensiveLossIncome"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsofComprehensiveLossIncome" xlink:type="extended" id="i82704b64531a4a33b561215471b859c1_ConsolidatedStatementsofComprehensiveLossIncome"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="avnw-20200703.xsd#ConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ConsolidatedBalanceSheets" xlink:type="extended" id="ia5721a1cba554ad99d096b96c1432d42_ConsolidatedBalanceSheets"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="avnw-20200703.xsd#ConsolidatedBalanceSheetsParenthetical"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" id="i4c868306358f414ab9b25947262ea5eb_ConsolidatedBalanceSheetsParenthetical"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="simple" xlink:href="avnw-20200703.xsd#ConsolidatedStatementsOfCashFlows"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended" id="icee377a10aae4b79b6487723635b4fb5_ConsolidatedStatementsOfCashFlows"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsofEquity" xlink:type="simple" xlink:href="avnw-20200703.xsd#ConsolidatedStatementsofEquity"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ConsolidatedStatementsofEquity" xlink:type="extended" id="i4bb211e643a642f0af26ab63292cdad4_ConsolidatedStatementsofEquity">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_da045f73-27e1-4486-a5db-26dd4c890cc0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdateExtensibleList_360ad9df-6471-4efa-ae00-4f00f1689e72" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdateExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da045f73-27e1-4486-a5db-26dd4c890cc0" xlink:to="loc_us-gaap_AccountingStandardsUpdateExtensibleList_360ad9df-6471-4efa-ae00-4f00f1689e72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_da045f73-27e1-4486-a5db-26dd4c890cc0" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_31589fbc-a61f-491a-bea1-fc34aae49356" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_31589fbc-a61f-491a-bea1-fc34aae49356" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_eba49672-5185-4c27-b19f-6135f98c5abd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_eba49672-5185-4c27-b19f-6135f98c5abd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_178c827d-22e8-45dd-8a2d-20b1cafbda88" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_ProfitLoss_178c827d-22e8-45dd-8a2d-20b1cafbda88" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_52bfbcf8-c2a2-4f96-9f49-7f34fcbc3b0b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_52bfbcf8-c2a2-4f96-9f49-7f34fcbc3b0b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_e3aedf6f-95f2-498c-acaa-f32d88ea6033" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_e3aedf6f-95f2-498c-acaa-f32d88ea6033" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_7f9810d3-49c2-4e0e-aaab-9ac9db10de71" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_7f9810d3-49c2-4e0e-aaab-9ac9db10de71" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9775c1dc-7549-4eee-bce5-64f382806684" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_9775c1dc-7549-4eee-bce5-64f382806684" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_1a924105-3873-4122-87c1-31c07e7a959f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_1a924105-3873-4122-87c1-31c07e7a959f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_9c2027e4-81a7-4fea-a226-f389f173918b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_9c2027e4-81a7-4fea-a226-f389f173918b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_a590c66a-6e43-4625-9a90-3c7d0fe11c4e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_a590c66a-6e43-4625-9a90-3c7d0fe11c4e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_fe99b01c-7ee9-4133-abb0-b4094d6d9b75" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_fe99b01c-7ee9-4133-abb0-b4094d6d9b75" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_41e5db6d-7d0f-4e8e-abcd-729dce348ae2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_41e5db6d-7d0f-4e8e-abcd-729dce348ae2" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_58dc485a-1b7f-4191-acff-0ed5b3815d7e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_58dc485a-1b7f-4191-acff-0ed5b3815d7e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_402be548-615b-4345-9df2-11aaa2f461d0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_d34cffd9-2786-483c-b3d5-c3fb1dc37a98" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_402be548-615b-4345-9df2-11aaa2f461d0" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_cff251e2-dfe1-4799-8314-09d4a56ffd0c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_ad96b3c3-7003-4a62-8635-bdd556c6ec39" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_eba2cd91-257c-4b38-b6d5-a60638a1fb79" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_da045f73-27e1-4486-a5db-26dd4c890cc0" xlink:to="loc_us-gaap_StatementTable_eba2cd91-257c-4b38-b6d5-a60638a1fb79" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_1a9b628b-9842-423a-851c-02d91614f04f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_eba2cd91-257c-4b38-b6d5-a60638a1fb79" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_1a9b628b-9842-423a-851c-02d91614f04f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_1a9b628b-9842-423a-851c-02d91614f04f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1a9b628b-9842-423a-851c-02d91614f04f" xlink:to="loc_us-gaap_EquityComponentDomain_1a9b628b-9842-423a-851c-02d91614f04f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a63b300a-3e83-4e25-bc8d-d34432ad99db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_1a9b628b-9842-423a-851c-02d91614f04f" xlink:to="loc_us-gaap_EquityComponentDomain_a63b300a-3e83-4e25-bc8d-d34432ad99db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_fbf1d4d9-959a-499c-ba25-c509caed300c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a63b300a-3e83-4e25-bc8d-d34432ad99db" xlink:to="loc_us-gaap_ParentMember_fbf1d4d9-959a-499c-ba25-c509caed300c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_d08e4524-23ed-4a16-b981-b1ba6ad53d50" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_fbf1d4d9-959a-499c-ba25-c509caed300c" xlink:to="loc_us-gaap_CommonStockMember_d08e4524-23ed-4a16-b981-b1ba6ad53d50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_4f7fb11d-26e0-4dd3-9c0c-c25768735aae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_fbf1d4d9-959a-499c-ba25-c509caed300c" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_4f7fb11d-26e0-4dd3-9c0c-c25768735aae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_f682d55a-d317-412c-a3b0-8007341936b5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_fbf1d4d9-959a-499c-ba25-c509caed300c" xlink:to="loc_us-gaap_RetainedEarningsMember_f682d55a-d317-412c-a3b0-8007341936b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_f4664b8d-13cb-48ca-b631-083da519c66c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_fbf1d4d9-959a-499c-ba25-c509caed300c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_f4664b8d-13cb-48ca-b631-083da519c66c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_c72aa88b-de50-432a-b3ab-211570d7a6ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a63b300a-3e83-4e25-bc8d-d34432ad99db" xlink:to="loc_us-gaap_NoncontrollingInterestMember_c72aa88b-de50-432a-b3ab-211570d7a6ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e42f1d5a-852e-4bf1-aad5-69197b1c73a9" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_eba2cd91-257c-4b38-b6d5-a60638a1fb79" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e42f1d5a-852e-4bf1-aad5-69197b1c73a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e42f1d5a-852e-4bf1-aad5-69197b1c73a9_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e42f1d5a-852e-4bf1-aad5-69197b1c73a9" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e42f1d5a-852e-4bf1-aad5-69197b1c73a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_faccd55e-2fd1-49f5-aafd-15244832ce6b" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e42f1d5a-852e-4bf1-aad5-69197b1c73a9" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_faccd55e-2fd1-49f5-aafd-15244832ce6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_19358a49-f68b-436c-b680-6c2cdde2b4e2" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_faccd55e-2fd1-49f5-aafd-15244832ce6b" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_19358a49-f68b-436c-b680-6c2cdde2b4e2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="avnw-20200703.xsd#TheCompanyandSummaryofSignificantAccountingPolicies"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPolicies" xlink:type="extended" id="i4e87f681131f41c4922b152bbd625968_TheCompanyandSummaryofSignificantAccountingPolicies"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="avnw-20200703.xsd#TheCompanyandSummaryofSignificantAccountingPoliciesPolicies"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended" id="i354adcdddf8f488287f47ad49cb0a19f_TheCompanyandSummaryofSignificantAccountingPoliciesPolicies"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#TheCompanyandSummaryofSignificantAccountingPoliciesTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesTables" xlink:type="extended" id="i69bdd2d5512348a892352d2bada61af8_TheCompanyandSummaryofSignificantAccountingPoliciesTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#TheCompanyandSummaryofSignificantAccountingPoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesDetails" xlink:type="extended" id="idb3d1e0ce35745819bd4ef3889993d2e_TheCompanyandSummaryofSignificantAccountingPoliciesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_d8a122f1-5c29-4653-ae22-e4c3c0e993a3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_d8a122f1-5c29-4653-ae22-e4c3c0e993a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ProductWarrantyPeriod_9c3fd2d3-05dc-401f-8798-134777a6ae1a" xlink:href="avnw-20200703.xsd#avnw_ProductWarrantyPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_avnw_ProductWarrantyPeriod_9c3fd2d3-05dc-401f-8798-134777a6ae1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_09517e64-75ea-4b91-b0cb-0ec3a6fdd3f2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_09517e64-75ea-4b91-b0cb-0ec3a6fdd3f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NoncashInvestingNoncontrollingInterestBuyout_c1267856-0807-4564-803e-b9515373820d" xlink:href="avnw-20200703.xsd#avnw_NoncashInvestingNoncontrollingInterestBuyout"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_avnw_NoncashInvestingNoncontrollingInterestBuyout_c1267856-0807-4564-803e-b9515373820d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_fba4a5f8-c042-4a46-9ebc-1dc30bb98756" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_fba4a5f8-c042-4a46-9ebc-1dc30bb98756" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_a89c5270-e7ab-4caf-a53d-798d6b975bc8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_a89c5270-e7ab-4caf-a53d-798d6b975bc8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_6dcb548e-3ac6-4592-8487-fba939c449a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_6dcb548e-3ac6-4592-8487-fba939c449a5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_9dffffbd-eb47-45da-b241-f217557ab6e8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_9dffffbd-eb47-45da-b241-f217557ab6e8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_dad13c2a-4f64-4a4a-ab8e-e841bc39670c" xlink:to="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_508fecfc-e25d-4e25-a3d8-1c9ce7b3747a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_srt_ProductOrServiceAxis_508fecfc-e25d-4e25-a3d8-1c9ce7b3747a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_508fecfc-e25d-4e25-a3d8-1c9ce7b3747a_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_508fecfc-e25d-4e25-a3d8-1c9ce7b3747a" xlink:to="loc_srt_ProductsAndServicesDomain_508fecfc-e25d-4e25-a3d8-1c9ce7b3747a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_93c659a8-97a0-4f1c-9a2a-1cd190278e79" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_508fecfc-e25d-4e25-a3d8-1c9ce7b3747a" xlink:to="loc_srt_ProductsAndServicesDomain_93c659a8-97a0-4f1c-9a2a-1cd190278e79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_CustomerServicesInventoriesMember_794a85f4-9fbd-4a5e-8dae-9406e24293ce" xlink:href="avnw-20200703.xsd#avnw_CustomerServicesInventoriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_93c659a8-97a0-4f1c-9a2a-1cd190278e79" xlink:to="loc_avnw_CustomerServicesInventoriesMember_794a85f4-9fbd-4a5e-8dae-9406e24293ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_c826d206-ffa9-4a5e-b71b-e23de01a68e0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_c826d206-ffa9-4a5e-b71b-e23de01a68e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_c826d206-ffa9-4a5e-b71b-e23de01a68e0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_c826d206-ffa9-4a5e-b71b-e23de01a68e0" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_c826d206-ffa9-4a5e-b71b-e23de01a68e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_6e240f8f-fbcb-413f-be8e-2549581d6328" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_c826d206-ffa9-4a5e-b71b-e23de01a68e0" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_6e240f8f-fbcb-413f-be8e-2549581d6328" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_46144f8b-c018-4d61-809d-b6f8a30389ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_6e240f8f-fbcb-413f-be8e-2549581d6328" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_46144f8b-c018-4d61-809d-b6f8a30389ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_28c840e1-a658-468a-b5d3-62bae3d4fdd5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_28c840e1-a658-468a-b5d3-62bae3d4fdd5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_28c840e1-a658-468a-b5d3-62bae3d4fdd5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_28c840e1-a658-468a-b5d3-62bae3d4fdd5" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_28c840e1-a658-468a-b5d3-62bae3d4fdd5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_591e3535-79b1-44fa-92b4-4067f1562a6f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_28c840e1-a658-468a-b5d3-62bae3d4fdd5" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_591e3535-79b1-44fa-92b4-4067f1562a6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_566a6bbf-b6c3-4632-ba8f-c876681c42b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_591e3535-79b1-44fa-92b4-4067f1562a6f" xlink:to="loc_us-gaap_SalesRevenueNetMember_566a6bbf-b6c3-4632-ba8f-c876681c42b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_70deb17d-d4b8-4407-85fe-96333af448f6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_srt_MajorCustomersAxis_70deb17d-d4b8-4407-85fe-96333af448f6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_70deb17d-d4b8-4407-85fe-96333af448f6_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_70deb17d-d4b8-4407-85fe-96333af448f6" xlink:to="loc_srt_NameOfMajorCustomerDomain_70deb17d-d4b8-4407-85fe-96333af448f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_50ad424f-92f4-4d63-b8f1-3a58fe80f198" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_70deb17d-d4b8-4407-85fe-96333af448f6" xlink:to="loc_srt_NameOfMajorCustomerDomain_50ad424f-92f4-4d63-b8f1-3a58fe80f198" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_MobileTelephoneNetworksMember_8a876ada-a9d7-4328-8d6a-75b5fdfe4dd8" xlink:href="avnw-20200703.xsd#avnw_MobileTelephoneNetworksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_50ad424f-92f4-4d63-b8f1-3a58fe80f198" xlink:to="loc_avnw_MobileTelephoneNetworksMember_8a876ada-a9d7-4328-8d6a-75b5fdfe4dd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_6b2b4365-807d-4b27-a0f7-d1ce3ba995b9" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_srt_StatementGeographicalAxis_6b2b4365-807d-4b27-a0f7-d1ce3ba995b9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_6b2b4365-807d-4b27-a0f7-d1ce3ba995b9_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_6b2b4365-807d-4b27-a0f7-d1ce3ba995b9" xlink:to="loc_srt_SegmentGeographicalDomain_6b2b4365-807d-4b27-a0f7-d1ce3ba995b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_c3c09a23-03eb-4af2-9c34-98ac691d7909" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_6b2b4365-807d-4b27-a0f7-d1ce3ba995b9" xlink:to="loc_srt_SegmentGeographicalDomain_c3c09a23-03eb-4af2-9c34-98ac691d7909" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_ZA_caf4e8c8-438d-4a1f-9058-5836d82e186f" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_ZA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c09a23-03eb-4af2-9c34-98ac691d7909" xlink:to="loc_country_ZA_caf4e8c8-438d-4a1f-9058-5836d82e186f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_a92aed45-7b28-440a-9fae-4aa4783f26e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_a92aed45-7b28-440a-9fae-4aa4783f26e9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_a92aed45-7b28-440a-9fae-4aa4783f26e9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_a92aed45-7b28-440a-9fae-4aa4783f26e9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_a92aed45-7b28-440a-9fae-4aa4783f26e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_230f29b6-c428-4258-9b0c-d4ca8fb9aa14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_a92aed45-7b28-440a-9fae-4aa4783f26e9" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_230f29b6-c428-4258-9b0c-d4ca8fb9aa14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_ce15cfb2-b057-49d8-a4bc-c2aa9a6d4d9d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_230f29b6-c428-4258-9b0c-d4ca8fb9aa14" xlink:to="loc_us-gaap_CostOfSalesMember_ce15cfb2-b057-49d8-a4bc-c2aa9a6d4d9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpenseMember_00220f86-9a42-4617-9342-e8edb2a9ef1f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_230f29b6-c428-4258-9b0c-d4ca8fb9aa14" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpenseMember_00220f86-9a42-4617-9342-e8edb2a9ef1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_39d4c735-4d31-4a48-9fc9-d82da04f89a6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_srt_RangeAxis_39d4c735-4d31-4a48-9fc9-d82da04f89a6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_39d4c735-4d31-4a48-9fc9-d82da04f89a6_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_39d4c735-4d31-4a48-9fc9-d82da04f89a6" xlink:to="loc_srt_RangeMember_39d4c735-4d31-4a48-9fc9-d82da04f89a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_b109a98a-d479-4c96-89bf-d64c49492993" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_39d4c735-4d31-4a48-9fc9-d82da04f89a6" xlink:to="loc_srt_RangeMember_b109a98a-d479-4c96-89bf-d64c49492993" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a5f7ee8a-8091-4d42-9ff7-595393b0b022" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_b109a98a-d479-4c96-89bf-d64c49492993" xlink:to="loc_srt_MinimumMember_a5f7ee8a-8091-4d42-9ff7-595393b0b022" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a2702888-95b5-462a-a1ac-0eb6915b3dd2" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_b109a98a-d479-4c96-89bf-d64c49492993" xlink:to="loc_srt_MaximumMember_a2702888-95b5-462a-a1ac-0eb6915b3dd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_161922f7-da6d-4ed5-a8f3-4cb50fc7643f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e6f144ab-efa0-42f4-865a-1ebcf7bd42de" xlink:to="loc_srt_OwnershipAxis_161922f7-da6d-4ed5-a8f3-4cb50fc7643f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_161922f7-da6d-4ed5-a8f3-4cb50fc7643f_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_161922f7-da6d-4ed5-a8f3-4cb50fc7643f" xlink:to="loc_srt_OwnershipDomain_161922f7-da6d-4ed5-a8f3-4cb50fc7643f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_d97b346f-b196-46f3-b82c-2b191a580c68" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_161922f7-da6d-4ed5-a8f3-4cb50fc7643f" xlink:to="loc_srt_OwnershipDomain_d97b346f-b196-46f3-b82c-2b191a580c68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_SubsidiaryCompanyInSouthAfricaMember_ed868b6b-bf24-425e-80a1-5b834e4198b0" xlink:href="avnw-20200703.xsd#avnw_SubsidiaryCompanyInSouthAfricaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_d97b346f-b196-46f3-b82c-2b191a580c68" xlink:to="loc_avnw_SubsidiaryCompanyInSouthAfricaMember_ed868b6b-bf24-425e-80a1-5b834e4198b0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#TheCompanyandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/TheCompanyandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentDetails" xlink:type="extended" id="i8e04bff48b1e4c2fad5dd7acde370655_TheCompanyandSummaryofSignificantAccountingPoliciesPropertyPlantandEquipmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_51092504-5c8c-4cdf-a7b7-dd51bf5144f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_66f107f2-0b5c-490a-959a-3ad33f64e71b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_51092504-5c8c-4cdf-a7b7-dd51bf5144f5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_66f107f2-0b5c-490a-959a-3ad33f64e71b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_dd46e76b-a38e-42c9-acfa-cc0277b9fb01" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_51092504-5c8c-4cdf-a7b7-dd51bf5144f5" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_dd46e76b-a38e-42c9-acfa-cc0277b9fb01" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ee524cff-bca7-45cc-a756-143cd4f37d8e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_dd46e76b-a38e-42c9-acfa-cc0277b9fb01" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ee524cff-bca7-45cc-a756-143cd4f37d8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ee524cff-bca7-45cc-a756-143cd4f37d8e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ee524cff-bca7-45cc-a756-143cd4f37d8e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_ee524cff-bca7-45cc-a756-143cd4f37d8e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_af7435ba-6574-450a-9a22-3d40ba29ac6f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_ee524cff-bca7-45cc-a756-143cd4f37d8e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_af7435ba-6574-450a-9a22-3d40ba29ac6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_aeacb2d3-be1e-4653-9e2a-8739a7868ff8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_af7435ba-6574-450a-9a22-3d40ba29ac6f" xlink:to="loc_us-gaap_BuildingMember_aeacb2d3-be1e-4653-9e2a-8739a7868ff8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_3e9f096f-d941-4b59-9de3-07594c42e8c9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_af7435ba-6574-450a-9a22-3d40ba29ac6f" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_3e9f096f-d941-4b59-9de3-07594c42e8c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_af559d04-cb1c-4c42-a7d6-6309fd966934" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_af7435ba-6574-450a-9a22-3d40ba29ac6f" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_af559d04-cb1c-4c42-a7d6-6309fd966934" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_eb047749-9a0c-4a83-8910-f57aaa7dcf0c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_af7435ba-6574-450a-9a22-3d40ba29ac6f" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_eb047749-9a0c-4a83-8910-f57aaa7dcf0c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_7b53f682-4bfb-4503-8f4b-ee7446e1a7e9" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_dd46e76b-a38e-42c9-acfa-cc0277b9fb01" xlink:to="loc_srt_RangeAxis_7b53f682-4bfb-4503-8f4b-ee7446e1a7e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7b53f682-4bfb-4503-8f4b-ee7446e1a7e9_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_7b53f682-4bfb-4503-8f4b-ee7446e1a7e9" xlink:to="loc_srt_RangeMember_7b53f682-4bfb-4503-8f4b-ee7446e1a7e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d558733f-943f-40f7-8875-447b7c29953f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_7b53f682-4bfb-4503-8f4b-ee7446e1a7e9" xlink:to="loc_srt_RangeMember_d558733f-943f-40f7-8875-447b7c29953f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_1c3d665c-f1be-4e2c-82ae-b983827394a6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d558733f-943f-40f7-8875-447b7c29953f" xlink:to="loc_srt_MinimumMember_1c3d665c-f1be-4e2c-82ae-b983827394a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_87b266f3-e79c-4f48-98d5-c39c91c89ef4" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d558733f-943f-40f7-8875-447b7c29953f" xlink:to="loc_srt_MaximumMember_87b266f3-e79c-4f48-98d5-c39c91c89ef4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStock" xlink:type="simple" xlink:href="avnw-20200703.xsd#NetIncomeperShareofCommonStock"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStock" xlink:type="extended" id="i5410b478850c4620a187910ce29f1dd2_NetIncomeperShareofCommonStock"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStockTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#NetIncomeperShareofCommonStockTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStockTables" xlink:type="extended" id="i8e8ea4bf05ae4675a0a2e35d072f1733_NetIncomeperShareofCommonStockTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStockEarningsPerShareBasicandDilutedDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#NetIncomeperShareofCommonStockEarningsPerShareBasicandDilutedDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStockEarningsPerShareBasicandDilutedDetails" xlink:type="extended" id="i4579057f61434b3ca0b5f669f6cbea80_NetIncomeperShareofCommonStockEarningsPerShareBasicandDilutedDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStockScheduleofCommonStockExcludedBecausetheywereAntidilutiveDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#NetIncomeperShareofCommonStockScheduleofCommonStockExcludedBecausetheywereAntidilutiveDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomeperShareofCommonStockScheduleofCommonStockExcludedBecausetheywereAntidilutiveDetails" xlink:type="extended" id="id3494fb1bd6e4c0ba72399ea5acda3fe_NetIncomeperShareofCommonStockScheduleofCommonStockExcludedBecausetheywereAntidilutiveDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_7f3f8b3f-bbe5-4ad7-b882-2196444edf83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_903391b5-e0ba-4280-8689-88dd8fd29710" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_7f3f8b3f-bbe5-4ad7-b882-2196444edf83" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_903391b5-e0ba-4280-8689-88dd8fd29710" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_14abcd22-f931-4983-8d3e-49a58d085de6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_7f3f8b3f-bbe5-4ad7-b882-2196444edf83" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_14abcd22-f931-4983-8d3e-49a58d085de6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_58dc02ca-9051-46ed-9632-705d84afcfd9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_14abcd22-f931-4983-8d3e-49a58d085de6" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_58dc02ca-9051-46ed-9632-705d84afcfd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_58dc02ca-9051-46ed-9632-705d84afcfd9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_58dc02ca-9051-46ed-9632-705d84afcfd9" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_58dc02ca-9051-46ed-9632-705d84afcfd9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7c45013b-e50e-4bb5-ba0a-bd6bee411b2e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_58dc02ca-9051-46ed-9632-705d84afcfd9" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7c45013b-e50e-4bb5-ba0a-bd6bee411b2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_abf0d8e4-57e0-45c9-80c0-ffaed8b7b486" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7c45013b-e50e-4bb5-ba0a-bd6bee411b2e" xlink:to="loc_us-gaap_EmployeeStockOptionMember_abf0d8e4-57e0-45c9-80c0-ffaed8b7b486" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_RestrictedStockandPerformanceSharesandUnitsMember_be43e47c-096b-427d-9b3a-d62af771d639" xlink:href="avnw-20200703.xsd#avnw_RestrictedStockandPerformanceSharesandUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7c45013b-e50e-4bb5-ba0a-bd6bee411b2e" xlink:to="loc_avnw_RestrictedStockandPerformanceSharesandUnitsMember_be43e47c-096b-427d-9b3a-d62af771d639" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognition" xlink:type="simple" xlink:href="avnw-20200703.xsd#RevenueRecognition"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognition" xlink:type="extended" id="ia81f4db2bcdd48809924f0b53e00427b_RevenueRecognition"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#RevenueRecognitionTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionTables" xlink:type="extended" id="ia9ad10ae6e00414a9a77c9e81d6c8f24_RevenueRecognitionTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionContractedBalancesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#RevenueRecognitionContractedBalancesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionContractedBalancesDetails" xlink:type="extended" id="i690396ad25bc4c829316e6d21e41273e_RevenueRecognitionContractedBalancesDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionNarrativeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#RevenueRecognitionNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionNarrativeDetails" xlink:type="extended" id="i4fcb190cea364b458b8869ecfa1e3fb5_RevenueRecognitionNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_071d925f-74e6-45c3-abf1-41e03f1c124b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_us-gaap_ContractWithCustomerLiability_071d925f-74e6-45c3-abf1-41e03f1c124b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ContractWithCustomerLiabilityCurrentPercent_eff4fc73-0c18-4d07-ab6a-6a6e7a91fb9d" xlink:href="avnw-20200703.xsd#avnw_ContractWithCustomerLiabilityCurrentPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_avnw_ContractWithCustomerLiabilityCurrentPercent_eff4fc73-0c18-4d07-ab6a-6a6e7a91fb9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_e74676d0-3a41-4df8-9456-3df211a0987a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_e74676d0-3a41-4df8-9456-3df211a0987a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_4fe3ed31-dd4e-43ab-bdb3-9e969aadc3b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_4fe3ed31-dd4e-43ab-bdb3-9e969aadc3b2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_ff63eddf-096c-4e8e-937c-75223fc8f91a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_ff63eddf-096c-4e8e-937c-75223fc8f91a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledReceivablesCurrent_ec475058-3991-4e61-a712-b2beeec1dacd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnbilledReceivablesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_us-gaap_UnbilledReceivablesCurrent_ec475058-3991-4e61-a712-b2beeec1dacd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_6b126545-016d-4b70-b709-72f3d9804c3a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_6b126545-016d-4b70-b709-72f3d9804c3a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_38c1ea49-caaa-4be8-8d98-ad9b80327cd7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_a3a45f48-05ec-40d8-9209-960e9e2125e4" xlink:to="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_38c1ea49-caaa-4be8-8d98-ad9b80327cd7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_db4bd2fb-0bfd-499b-bff4-89241a21f0e3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_38c1ea49-caaa-4be8-8d98-ad9b80327cd7" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_db4bd2fb-0bfd-499b-bff4-89241a21f0e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_db4bd2fb-0bfd-499b-bff4-89241a21f0e3_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_db4bd2fb-0bfd-499b-bff4-89241a21f0e3" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_db4bd2fb-0bfd-499b-bff4-89241a21f0e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_01cc16ed-f496-48b9-bb1c-195619f3d4e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_db4bd2fb-0bfd-499b-bff4-89241a21f0e3" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_01cc16ed-f496-48b9-bb1c-195619f3d4e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_59e8cb6a-2999-4fda-a64f-95f5acbfbcd8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_01cc16ed-f496-48b9-bb1c-195619f3d4e1" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_59e8cb6a-2999-4fda-a64f-95f5acbfbcd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_928cfbcf-fb24-4c3e-80a3-80ac6e94af2e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_01cc16ed-f496-48b9-bb1c-195619f3d4e1" xlink:to="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_928cfbcf-fb24-4c3e-80a3-80ac6e94af2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_061826ab-a5bf-45ed-b787-03a60befc452" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_38c1ea49-caaa-4be8-8d98-ad9b80327cd7" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_061826ab-a5bf-45ed-b787-03a60befc452" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_061826ab-a5bf-45ed-b787-03a60befc452_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_061826ab-a5bf-45ed-b787-03a60befc452" xlink:to="loc_us-gaap_TypeOfAdoptionMember_061826ab-a5bf-45ed-b787-03a60befc452_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_85317461-523e-4789-8850-96318e184563" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_061826ab-a5bf-45ed-b787-03a60befc452" xlink:to="loc_us-gaap_TypeOfAdoptionMember_85317461-523e-4789-8850-96318e184563" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_c000ab88-77a9-488f-be05-1687aabaddf4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_85317461-523e-4789-8850-96318e184563" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_c000ab88-77a9-488f-be05-1687aabaddf4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_57bfe5f0-dd7e-403b-aec1-dff00fc631eb" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_38c1ea49-caaa-4be8-8d98-ad9b80327cd7" xlink:to="loc_srt_ProductOrServiceAxis_57bfe5f0-dd7e-403b-aec1-dff00fc631eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_57bfe5f0-dd7e-403b-aec1-dff00fc631eb_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_57bfe5f0-dd7e-403b-aec1-dff00fc631eb" xlink:to="loc_srt_ProductsAndServicesDomain_57bfe5f0-dd7e-403b-aec1-dff00fc631eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c1fcd83c-69ff-4fc2-93db-b8016c90b275" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_57bfe5f0-dd7e-403b-aec1-dff00fc631eb" xlink:to="loc_srt_ProductsAndServicesDomain_c1fcd83c-69ff-4fc2-93db-b8016c90b275" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_0d0d9baa-832a-48cc-8030-d9fb6aa63574" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c1fcd83c-69ff-4fc2-93db-b8016c90b275" xlink:to="loc_us-gaap_ProductMember_0d0d9baa-832a-48cc-8030-d9fb6aa63574" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_d0e7f076-b6ad-4c66-9b6c-3f39be87f133" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c1fcd83c-69ff-4fc2-93db-b8016c90b275" xlink:to="loc_us-gaap_ServiceMember_d0e7f076-b6ad-4c66-9b6c-3f39be87f133" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_206a026f-dcfb-4137-a2a1-6b96bc75a40c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_38c1ea49-caaa-4be8-8d98-ad9b80327cd7" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_206a026f-dcfb-4137-a2a1-6b96bc75a40c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_206a026f-dcfb-4137-a2a1-6b96bc75a40c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_206a026f-dcfb-4137-a2a1-6b96bc75a40c" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_206a026f-dcfb-4137-a2a1-6b96bc75a40c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_0ff8ce37-484a-4c0b-b09b-6466486a0bfd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_206a026f-dcfb-4137-a2a1-6b96bc75a40c" xlink:to="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_0ff8ce37-484a-4c0b-b09b-6466486a0bfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredAtPointInTimeMember_be07c6d7-3ad7-4183-ac77-e9c18a2416f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransferredAtPointInTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_0ff8ce37-484a-4c0b-b09b-6466486a0bfd" xlink:to="loc_us-gaap_TransferredAtPointInTimeMember_be07c6d7-3ad7-4183-ac77-e9c18a2416f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransferredOverTimeMember_b3399576-08f5-4c9b-b9f8-e9b63b32360a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransferredOverTimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_0ff8ce37-484a-4c0b-b09b-6466486a0bfd" xlink:to="loc_us-gaap_TransferredOverTimeMember_b3399576-08f5-4c9b-b9f8-e9b63b32360a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_TransferofControlMember_90865e5b-bcd9-48dc-b643-8c977122217d" xlink:href="avnw-20200703.xsd#avnw_TransferofControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_0ff8ce37-484a-4c0b-b09b-6466486a0bfd" xlink:to="loc_avnw_TransferofControlMember_90865e5b-bcd9-48dc-b643-8c977122217d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9feb3066-1990-4ac0-a890-59138de1808d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_38c1ea49-caaa-4be8-8d98-ad9b80327cd7" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9feb3066-1990-4ac0-a890-59138de1808d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_9feb3066-1990-4ac0-a890-59138de1808d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9feb3066-1990-4ac0-a890-59138de1808d" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_9feb3066-1990-4ac0-a890-59138de1808d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_091c6be7-4760-4c25-b789-828537892737" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9feb3066-1990-4ac0-a890-59138de1808d" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_091c6be7-4760-4c25-b789-828537892737" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledRevenuesMember_0df7e23b-d90a-45ae-8779-9b6e6c834a28" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnbilledRevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_091c6be7-4760-4c25-b789-828537892737" xlink:to="loc_us-gaap_UnbilledRevenuesMember_0df7e23b-d90a-45ae-8779-9b6e6c834a28" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionPerformanceObligationsDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#RevenueRecognitionPerformanceObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionPerformanceObligationsDetails" xlink:type="extended" id="i2937c9fe7f7646dca5f968cd85bec734_RevenueRecognitionPerformanceObligationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_4d421400-0644-4e6f-b8dc-d06024372b57" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_4d421400-0644-4e6f-b8dc-d06024372b57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_af5937f0-33eb-4e93-8b62-340209a15dc9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_af5937f0-33eb-4e93-8b62-340209a15dc9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_913cd36c-58e5-4963-9b00-76d8af3d3313" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_913cd36c-58e5-4963-9b00-76d8af3d3313" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_5f1da472-e2e5-4715-85c2-776d2eeb9ead" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_5f1da472-e2e5-4715-85c2-776d2eeb9ead" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_42c98fb4-8212-4e2f-be89-b2291fefb93e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_5f1da472-e2e5-4715-85c2-776d2eeb9ead" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_42c98fb4-8212-4e2f-be89-b2291fefb93e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionPerformanceObligationsDetails_1" xlink:type="simple" xlink:href="avnw-20200703.xsd#RevenueRecognitionPerformanceObligationsDetails_1"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionPerformanceObligationsDetails_1" xlink:type="extended" id="ie015a40784d34566b7545c77161d34de_RevenueRecognitionPerformanceObligationsDetails_1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_4d421400-0644-4e6f-b8dc-d06024372b57" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_4d421400-0644-4e6f-b8dc-d06024372b57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_af5937f0-33eb-4e93-8b62-340209a15dc9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_af5937f0-33eb-4e93-8b62-340209a15dc9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_913cd36c-58e5-4963-9b00-76d8af3d3313" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_913cd36c-58e5-4963-9b00-76d8af3d3313" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_5f1da472-e2e5-4715-85c2-776d2eeb9ead" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_51d67334-00fe-41f7-bc17-ff62633ced37" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_5f1da472-e2e5-4715-85c2-776d2eeb9ead" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionImpactonFinancialStatementsDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#RevenueRecognitionImpactonFinancialStatementsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionImpactonFinancialStatementsDetails" xlink:type="extended" id="ifb4cab1114d64064af8ddd2aff2fde6e_RevenueRecognitionImpactonFinancialStatementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_cd02d1fc-40bd-40b2-b814-bf7e0dcc1e64" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementRelatedDisclosuresAbstract_7ec8e270-1598-4ad2-8fec-753daaacae12" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementRelatedDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_cd02d1fc-40bd-40b2-b814-bf7e0dcc1e64" xlink:to="loc_us-gaap_IncomeStatementRelatedDisclosuresAbstract_7ec8e270-1598-4ad2-8fec-753daaacae12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_d10d8678-83dc-4369-a143-22968b8f2122" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementRelatedDisclosuresAbstract_7ec8e270-1598-4ad2-8fec-753daaacae12" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_d10d8678-83dc-4369-a143-22968b8f2122" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_e0d0eefc-c1a8-482a-bd4e-a09e24c1b948" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementRelatedDisclosuresAbstract_7ec8e270-1598-4ad2-8fec-753daaacae12" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_e0d0eefc-c1a8-482a-bd4e-a09e24c1b948" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_966bfcfa-19b4-4a52-8535-5eaa15b2ebb2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementRelatedDisclosuresAbstract_7ec8e270-1598-4ad2-8fec-753daaacae12" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_966bfcfa-19b4-4a52-8535-5eaa15b2ebb2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_6c6565f2-8ac9-44b7-9d00-55038dcc43be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementRelatedDisclosuresAbstract_7ec8e270-1598-4ad2-8fec-753daaacae12" xlink:to="loc_us-gaap_ProfitLoss_6c6565f2-8ac9-44b7-9d00-55038dcc43be" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_57e45dae-d72d-4fa3-8862-477f75885e87" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_cd02d1fc-40bd-40b2-b814-bf7e0dcc1e64" xlink:to="loc_us-gaap_StatementOfFinancialPositionAbstract_57e45dae-d72d-4fa3-8862-477f75885e87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_57e45dae-d72d-4fa3-8862-477f75885e87" xlink:to="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_a101300b-9846-44c3-8112-cbb3e96bdb52" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_a101300b-9846-44c3-8112-cbb3e96bdb52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledReceivablesCurrent_337fbdbc-7035-46a6-b125-9c6fbe3c9e0f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnbilledReceivablesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:to="loc_us-gaap_UnbilledReceivablesCurrent_337fbdbc-7035-46a6-b125-9c6fbe3c9e0f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_InventoryExcludingPartsAndComponentsNetOfReserves_83f7997b-d244-4ca7-8725-cb13646d8739" xlink:href="avnw-20200703.xsd#avnw_InventoryExcludingPartsAndComponentsNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:to="loc_avnw_InventoryExcludingPartsAndComponentsNetOfReserves_83f7997b-d244-4ca7-8725-cb13646d8739" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_9695d451-a2d0-45cb-ad54-ba8701dbddfe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:to="loc_us-gaap_OtherAssetsCurrent_9695d451-a2d0-45cb-ad54-ba8701dbddfe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_8610ce39-92d9-44ea-b601-e88cf81efebe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_8610ce39-92d9-44ea-b601-e88cf81efebe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_08d6b9b3-11db-4348-bfe5-cda02b186633" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_66367cba-aa1d-4e00-a2c9-4624de4768e6" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_08d6b9b3-11db-4348-bfe5-cda02b186633" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_1fb5bca0-f0de-4d48-a9c5-d031efdf6be0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_57e45dae-d72d-4fa3-8862-477f75885e87" xlink:to="loc_us-gaap_LiabilitiesAbstract_1fb5bca0-f0de-4d48-a9c5-d031efdf6be0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_48dc3497-8aa8-4acf-8bf1-c685576b81ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1fb5bca0-f0de-4d48-a9c5-d031efdf6be0" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_48dc3497-8aa8-4acf-8bf1-c685576b81ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_b5b22d7d-8b31-4e8c-83d5-e8d4215dff10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1fb5bca0-f0de-4d48-a9c5-d031efdf6be0" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_b5b22d7d-8b31-4e8c-83d5-e8d4215dff10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_57c51098-e0fa-4d8f-a186-44377fe49010" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1fb5bca0-f0de-4d48-a9c5-d031efdf6be0" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_57c51098-e0fa-4d8f-a186-44377fe49010" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_bde25ca1-d9af-425b-846b-ba561b096ce0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilityForUncertainTaxPositionsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_1fb5bca0-f0de-4d48-a9c5-d031efdf6be0" xlink:to="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_bde25ca1-d9af-425b-846b-ba561b096ce0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_23fcc3ee-8d8b-4384-9854-3ebb7242815a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_57e45dae-d72d-4fa3-8862-477f75885e87" xlink:to="loc_us-gaap_StockholdersEquityAbstract_23fcc3ee-8d8b-4384-9854-3ebb7242815a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_c27cd950-b0db-473f-87c5-0efe0c901eae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_23fcc3ee-8d8b-4384-9854-3ebb7242815a" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_c27cd950-b0db-473f-87c5-0efe0c901eae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_412823ee-e7db-4ed7-b65c-51db8418ffda" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_cd02d1fc-40bd-40b2-b814-bf7e0dcc1e64" xlink:to="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_412823ee-e7db-4ed7-b65c-51db8418ffda" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_d3d10ac3-d310-4045-8cfe-c2e05580e9d7" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_412823ee-e7db-4ed7-b65c-51db8418ffda" xlink:to="loc_srt_ProductOrServiceAxis_d3d10ac3-d310-4045-8cfe-c2e05580e9d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d3d10ac3-d310-4045-8cfe-c2e05580e9d7_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_d3d10ac3-d310-4045-8cfe-c2e05580e9d7" xlink:to="loc_srt_ProductsAndServicesDomain_d3d10ac3-d310-4045-8cfe-c2e05580e9d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_56184d11-7cca-4e08-bb52-d53a429109d6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_d3d10ac3-d310-4045-8cfe-c2e05580e9d7" xlink:to="loc_srt_ProductsAndServicesDomain_56184d11-7cca-4e08-bb52-d53a429109d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_7db6ca56-3841-404b-b180-6555c0bb2803" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_56184d11-7cca-4e08-bb52-d53a429109d6" xlink:to="loc_us-gaap_ProductMember_7db6ca56-3841-404b-b180-6555c0bb2803" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_98559f87-eaa0-4d57-810b-a8040fdd6328" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_56184d11-7cca-4e08-bb52-d53a429109d6" xlink:to="loc_us-gaap_ServiceMember_98559f87-eaa0-4d57-810b-a8040fdd6328" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_e99bfea2-7174-4a74-b3ab-368d44c7180f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_412823ee-e7db-4ed7-b65c-51db8418ffda" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_e99bfea2-7174-4a74-b3ab-368d44c7180f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_e99bfea2-7174-4a74-b3ab-368d44c7180f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_e99bfea2-7174-4a74-b3ab-368d44c7180f" xlink:to="loc_us-gaap_TypeOfAdoptionMember_e99bfea2-7174-4a74-b3ab-368d44c7180f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_47486950-dc36-4000-b02e-8c262961899f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_e99bfea2-7174-4a74-b3ab-368d44c7180f" xlink:to="loc_us-gaap_TypeOfAdoptionMember_47486950-dc36-4000-b02e-8c262961899f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_84d05b60-f5aa-45d3-8ac1-5821033e165e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_47486950-dc36-4000-b02e-8c262961899f" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_84d05b60-f5aa-45d3-8ac1-5821033e165e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_fbc6f275-71cd-4540-aaa5-d9e01ad531eb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_412823ee-e7db-4ed7-b65c-51db8418ffda" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_fbc6f275-71cd-4540-aaa5-d9e01ad531eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_fbc6f275-71cd-4540-aaa5-d9e01ad531eb_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_fbc6f275-71cd-4540-aaa5-d9e01ad531eb" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_fbc6f275-71cd-4540-aaa5-d9e01ad531eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_a0ddf168-087a-44c7-89a1-2611f60aaa96" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_fbc6f275-71cd-4540-aaa5-d9e01ad531eb" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_a0ddf168-087a-44c7-89a1-2611f60aaa96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_17669286-e98b-480c-8f83-bd1afad02993" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_a0ddf168-087a-44c7-89a1-2611f60aaa96" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_17669286-e98b-480c-8f83-bd1afad02993" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_d7f9a8c7-4be1-4472-a256-227335c171df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_a0ddf168-087a-44c7-89a1-2611f60aaa96" xlink:to="loc_us-gaap_CalculatedUnderRevenueGuidanceInEffectBeforeTopic606Member_d7f9a8c7-4be1-4472-a256-227335c171df" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/Leases" xlink:type="simple" xlink:href="avnw-20200703.xsd#Leases"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/Leases" xlink:type="extended" id="ia3d98a504c0a4265a95073f71ccabf73_Leases"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/LeasesTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#LeasesTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/LeasesTables" xlink:type="extended" id="i095a02ce1a294ae28dd0cbaf139f6bd8_LeasesTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/LeasesNarrativeDetails" xlink:type="extended" id="icb3cbe7f619b4af4907a16cf270f4550_LeasesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_cffee287-0cd1-4bcb-89eb-dd95eb99f231" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_cffee287-0cd1-4bcb-89eb-dd95eb99f231" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_dcb28274-4e87-42ac-8770-9e3662e15c60" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_dcb28274-4e87-42ac-8770-9e3662e15c60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfRealEstateProperty_da141d6f-baa7-421b-bd54-8104da455ba4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AreaOfRealEstateProperty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_AreaOfRealEstateProperty_da141d6f-baa7-421b-bd54-8104da455ba4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdateExtensibleList_2f03e1f2-bdd6-45c0-83e1-5084de0ad2aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdateExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_AccountingStandardsUpdateExtensibleList_2f03e1f2-bdd6-45c0-83e1-5084de0ad2aa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_741c520c-cdda-47c3-b2a9-a255f6bc87eb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_741c520c-cdda-47c3-b2a9-a255f6bc87eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_17574a32-dc4e-4204-ba37-d654b68c8752" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_OperatingLeaseLiability_17574a32-dc4e-4204-ba37-d654b68c8752" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_a4663ae7-ddc4-44fd-8030-a19ecdfe7dcd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_a4663ae7-ddc4-44fd-8030-a19ecdfe7dcd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_5578abc1-e2e5-4c73-9447-8f8b229bfca2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_5578abc1-e2e5-4c73-9447-8f8b229bfca2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_fa5b3bdf-4fe9-49c1-8f9d-03f2e18f080e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_OperatingLeasePayments_fa5b3bdf-4fe9-49c1-8f9d-03f2e18f080e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_e81b78ff-2691-4668-9e83-df5a2d7a97ea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_e81b78ff-2691-4668-9e83-df5a2d7a97ea" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseExpense_e50f667d-e98d-47c1-8fa9-12b9d769b0fa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_OperatingLeaseExpense_e50f667d-e98d-47c1-8fa9-12b9d769b0fa" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseAndRentalExpense_17085445-d1d7-4a31-92e2-156ff85009cd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseAndRentalExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_LeaseAndRentalExpense_17085445-d1d7-4a31-92e2-156ff85009cd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_4d95dfd8-d0be-4758-b973-2351f103356b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_fde89d0a-4500-4143-8ea0-1425b6f1cd83" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_4d95dfd8-d0be-4758-b973-2351f103356b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_c7b3e128-8b5e-43d5-b266-556696e39257" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_4d95dfd8-d0be-4758-b973-2351f103356b" xlink:to="loc_srt_RangeAxis_c7b3e128-8b5e-43d5-b266-556696e39257" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c7b3e128-8b5e-43d5-b266-556696e39257_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_c7b3e128-8b5e-43d5-b266-556696e39257" xlink:to="loc_srt_RangeMember_c7b3e128-8b5e-43d5-b266-556696e39257_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_40dacaad-bcf3-4f09-bada-bac47d5164f0" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_c7b3e128-8b5e-43d5-b266-556696e39257" xlink:to="loc_srt_RangeMember_40dacaad-bcf3-4f09-bada-bac47d5164f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_44480c51-7111-4f90-927f-e95bf2a702af" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_40dacaad-bcf3-4f09-bada-bac47d5164f0" xlink:to="loc_srt_MinimumMember_44480c51-7111-4f90-927f-e95bf2a702af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_8033945c-c453-4ec7-8fe8-5b74c3f16b9a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_40dacaad-bcf3-4f09-bada-bac47d5164f0" xlink:to="loc_srt_MaximumMember_8033945c-c453-4ec7-8fe8-5b74c3f16b9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9d99247a-1325-4d60-b0c8-f9cc3280acfa" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_4d95dfd8-d0be-4758-b973-2351f103356b" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9d99247a-1325-4d60-b0c8-f9cc3280acfa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9d99247a-1325-4d60-b0c8-f9cc3280acfa_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9d99247a-1325-4d60-b0c8-f9cc3280acfa" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_9d99247a-1325-4d60-b0c8-f9cc3280acfa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_b22f842f-184f-416e-a8a3-a67df2e3a83f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_9d99247a-1325-4d60-b0c8-f9cc3280acfa" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_b22f842f-184f-416e-a8a3-a67df2e3a83f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_OfficeBuildingInAustinTexasMember_3f09c4b0-14b3-41ca-a9a7-f25549ed5077" xlink:href="avnw-20200703.xsd#avnw_OfficeBuildingInAustinTexasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_b22f842f-184f-416e-a8a3-a67df2e3a83f" xlink:to="loc_avnw_OfficeBuildingInAustinTexasMember_3f09c4b0-14b3-41ca-a9a7-f25549ed5077" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis_fb8cbfef-e8dd-497c-b91f-218c6ac6487b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_4d95dfd8-d0be-4758-b973-2351f103356b" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis_fb8cbfef-e8dd-497c-b91f-218c6ac6487b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_fb8cbfef-e8dd-497c-b91f-218c6ac6487b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis_fb8cbfef-e8dd-497c-b91f-218c6ac6487b" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_fb8cbfef-e8dd-497c-b91f-218c6ac6487b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_3e808632-e10b-4e5d-aed3-d08f2564e229" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis_fb8cbfef-e8dd-497c-b91f-218c6ac6487b" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_3e808632-e10b-4e5d-aed3-d08f2564e229" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertySubjectToOperatingLeaseMember_b3f82406-9161-4396-b132-dbef1eece490" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertySubjectToOperatingLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_3e808632-e10b-4e5d-aed3-d08f2564e229" xlink:to="loc_us-gaap_PropertySubjectToOperatingLeaseMember_b3f82406-9161-4396-b132-dbef1eece490" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_a79291e5-0831-4bb1-a406-a73b033f26dd" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_4d95dfd8-d0be-4758-b973-2351f103356b" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_a79291e5-0831-4bb1-a406-a73b033f26dd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_a79291e5-0831-4bb1-a406-a73b033f26dd_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_a79291e5-0831-4bb1-a406-a73b033f26dd" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_a79291e5-0831-4bb1-a406-a73b033f26dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_d32ac151-9292-44ca-8f3f-0a90f14e2bae" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_a79291e5-0831-4bb1-a406-a73b033f26dd" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_d32ac151-9292-44ca-8f3f-0a90f14e2bae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_88f9e416-8561-41fc-8b67-251da555e41c" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_d32ac151-9292-44ca-8f3f-0a90f14e2bae" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_88f9e416-8561-41fc-8b67-251da555e41c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/LeasesLeaseCostsTermandDiscountRateDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#LeasesLeaseCostsTermandDiscountRateDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/LeasesLeaseCostsTermandDiscountRateDetails" xlink:type="extended" id="i3dd42a53b31546e993a4e868f59341af_LeasesLeaseCostsTermandDiscountRateDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/LeasesFutureMinimumLeasePaymentsDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#LeasesFutureMinimumLeasePaymentsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/LeasesFutureMinimumLeasePaymentsDetails" xlink:type="extended" id="ib22875e0c26c41828313b995cddcc5ce_LeasesFutureMinimumLeasePaymentsDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/LeasesFutureMinimumLeasesPaymentsTopic840Details" xlink:type="simple" xlink:href="avnw-20200703.xsd#LeasesFutureMinimumLeasesPaymentsTopic840Details"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/LeasesFutureMinimumLeasesPaymentsTopic840Details" xlink:type="extended" id="i33c7d28bea5346e18ba8482297847b34_LeasesFutureMinimumLeasesPaymentsTopic840Details"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponents" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponents"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponents" xlink:type="extended" id="i4bba14bfedff4cd394e171fbced12057_BalanceSheetComponents"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsTables" xlink:type="extended" id="i6e8e4dc48335485db8baba2b117efcde_BalanceSheetComponentsTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsCashCashEquivalentsandRestrictedCashDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsCashCashEquivalentsandRestrictedCashDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsCashCashEquivalentsandRestrictedCashDetails" xlink:type="extended" id="i88b53fd463a2404aae4829a6e033a6e8_BalanceSheetComponentsCashCashEquivalentsandRestrictedCashDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsReceivablesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsReceivablesDetails" xlink:type="extended" id="ib7ab5f2cbdb64051b12e073161cc71f3_BalanceSheetComponentsReceivablesDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoriesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsInventoriesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoriesDetails" xlink:type="extended" id="i177c3a0512b5494a8e4093c04478b04f_BalanceSheetComponentsInventoriesDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoryAdjustmentsDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsInventoryAdjustmentsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoryAdjustmentsDetails" xlink:type="extended" id="i0f1d30f37d3545a9bf024bb85a8ca710_BalanceSheetComponentsInventoryAdjustmentsDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsPropertyPlantandEquipmentDetails" xlink:type="extended" id="i17eafa43d64d4a48aba12f9cf82d496e_BalanceSheetComponentsPropertyPlantandEquipmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_14ae05d8-28b8-474a-b46c-6917ee5d18fe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_4d4f99c9-74a1-4b8a-8f36-35fbd494090c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_14ae05d8-28b8-474a-b46c-6917ee5d18fe" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_4d4f99c9-74a1-4b8a-8f36-35fbd494090c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_76c81509-7c37-4863-8c52-f46b68eac0e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_14ae05d8-28b8-474a-b46c-6917ee5d18fe" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_76c81509-7c37-4863-8c52-f46b68eac0e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_b7773ecf-80c5-47f3-ab19-5804455ff245" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_14ae05d8-28b8-474a-b46c-6917ee5d18fe" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_b7773ecf-80c5-47f3-ab19-5804455ff245" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_57fcd6b9-1762-4d6e-a70d-e5399e691c09" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_14ae05d8-28b8-474a-b46c-6917ee5d18fe" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_57fcd6b9-1762-4d6e-a70d-e5399e691c09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_924f8933-cd9d-4e38-aa97-046c62747c01" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_57fcd6b9-1762-4d6e-a70d-e5399e691c09" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_924f8933-cd9d-4e38-aa97-046c62747c01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_924f8933-cd9d-4e38-aa97-046c62747c01_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_924f8933-cd9d-4e38-aa97-046c62747c01" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_924f8933-cd9d-4e38-aa97-046c62747c01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_714eda87-f898-49b9-8ce5-9b633dda810c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_924f8933-cd9d-4e38-aa97-046c62747c01" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_714eda87-f898-49b9-8ce5-9b633dda810c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_e451c44a-0929-4b6f-a63e-00cfb7f8f6a6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_714eda87-f898-49b9-8ce5-9b633dda810c" xlink:to="loc_us-gaap_LandMember_e451c44a-0929-4b6f-a63e-00cfb7f8f6a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_dcb395a6-0a3e-494f-ab8f-bf8d05d51e58" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_714eda87-f898-49b9-8ce5-9b633dda810c" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_dcb395a6-0a3e-494f-ab8f-bf8d05d51e58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_c23dbfaf-86b4-4fd6-b592-e51b15d65842" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SoftwareDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_714eda87-f898-49b9-8ce5-9b633dda810c" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_c23dbfaf-86b4-4fd6-b592-e51b15d65842" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_36927f72-c12e-45d0-b811-121e61b1c1a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_714eda87-f898-49b9-8ce5-9b633dda810c" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_36927f72-c12e-45d0-b811-121e61b1c1a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetUnderConstructionMember_b906ba34-7078-45bf-b55a-03c7ba06f585" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetUnderConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_714eda87-f898-49b9-8ce5-9b633dda810c" xlink:to="loc_us-gaap_AssetUnderConstructionMember_b906ba34-7078-45bf-b55a-03c7ba06f585" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsNarrativeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsNarrativeDetails" xlink:type="extended" id="id9f2710406334bfaa88a3fa72d271654_BalanceSheetComponentsNarrativeDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedExpensesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsAccruedExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedExpensesDetails" xlink:type="extended" id="icd5ba30c096a45568bcb3d668f39eb41_BalanceSheetComponentsAccruedExpensesDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedWarrantiesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsAccruedWarrantiesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedWarrantiesDetails" xlink:type="extended" id="i15d9323854b9406aa4b2d37b5de8ebd9_BalanceSheetComponentsAccruedWarrantiesDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAdvancedPaymentsandUnearnedIncomeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#BalanceSheetComponentsAdvancedPaymentsandUnearnedIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAdvancedPaymentsandUnearnedIncomeDetails" xlink:type="extended" id="i42e87294493f45588b611f077945e008_BalanceSheetComponentsAdvancedPaymentsandUnearnedIncomeDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilities" xlink:type="simple" xlink:href="avnw-20200703.xsd#FairValueMeasurementsOfAssetsAndLiabilities"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilities" xlink:type="extended" id="i0b5e14f7d0f14e0a94784c2dda672f4f_FairValueMeasurementsOfAssetsAndLiabilities"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#FairValueMeasurementsOfAssetsAndLiabilitiesTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesTables" xlink:type="extended" id="ic34920274a8d48b19dfe5ab5e5847d20_FairValueMeasurementsOfAssetsAndLiabilitiesTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#FairValueMeasurementsOfAssetsAndLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesDetails" xlink:type="extended" id="ifb99771b5b104d9ba1a8dca1046b360a_FairValueMeasurementsOfAssetsAndLiabilitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eba66e5b-100a-4e29-a183-e3be53592e53" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_7b6d09f8-bbb1-489d-b24d-99da631c89a8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eba66e5b-100a-4e29-a183-e3be53592e53" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_7b6d09f8-bbb1-489d-b24d-99da631c89a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_49879eb5-c8e9-4b64-b398-fea2bc450ea2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eba66e5b-100a-4e29-a183-e3be53592e53" xlink:to="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_49879eb5-c8e9-4b64-b398-fea2bc450ea2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_FairValueDisclosureNumberofFinancialInstitutions_4aa681fe-ca7e-48a2-b3db-ed22f4d92d62" xlink:href="avnw-20200703.xsd#avnw_FairValueDisclosureNumberofFinancialInstitutions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eba66e5b-100a-4e29-a183-e3be53592e53" xlink:to="loc_avnw_FairValueDisclosureNumberofFinancialInstitutions_4aa681fe-ca7e-48a2-b3db-ed22f4d92d62" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure_6d54d957-86dd-43a7-8011-4c371f2d3842" xlink:href="avnw-20200703.xsd#avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eba66e5b-100a-4e29-a183-e3be53592e53" xlink:to="loc_avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure_6d54d957-86dd-43a7-8011-4c371f2d3842" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_510ed2e8-9eb4-4ed9-b532-78555c204f14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eba66e5b-100a-4e29-a183-e3be53592e53" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_510ed2e8-9eb4-4ed9-b532-78555c204f14" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_ecd6d603-67a8-4fe7-8926-e0bf8d5c587a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_510ed2e8-9eb4-4ed9-b532-78555c204f14" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_ecd6d603-67a8-4fe7-8926-e0bf8d5c587a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_ecd6d603-67a8-4fe7-8926-e0bf8d5c587a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_ecd6d603-67a8-4fe7-8926-e0bf8d5c587a" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_ecd6d603-67a8-4fe7-8926-e0bf8d5c587a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_733a6b0f-aa91-48b3-9025-9b4ed3965181" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_ecd6d603-67a8-4fe7-8926-e0bf8d5c587a" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_733a6b0f-aa91-48b3-9025-9b4ed3965181" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_8882e9d0-5d7f-4abe-9af1-48bb311a08f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_733a6b0f-aa91-48b3-9025-9b4ed3965181" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_8882e9d0-5d7f-4abe-9af1-48bb311a08f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_c0e0d38c-4980-43ca-8a43-c012dfd8722a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_510ed2e8-9eb4-4ed9-b532-78555c204f14" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_c0e0d38c-4980-43ca-8a43-c012dfd8722a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_c0e0d38c-4980-43ca-8a43-c012dfd8722a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_c0e0d38c-4980-43ca-8a43-c012dfd8722a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_c0e0d38c-4980-43ca-8a43-c012dfd8722a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d84fe068-af22-436c-839e-2d7b675c2383" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_c0e0d38c-4980-43ca-8a43-c012dfd8722a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d84fe068-af22-436c-839e-2d7b675c2383" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_7e8a8866-998c-47b3-9b77-ff221174868a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d84fe068-af22-436c-839e-2d7b675c2383" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_7e8a8866-998c-47b3-9b77-ff221174868a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_5e2ac772-a9a6-4284-a5e4-f41700c551b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d84fe068-af22-436c-839e-2d7b675c2383" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_5e2ac772-a9a6-4284-a5e4-f41700c551b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_a803279f-60f1-4f55-9005-e0fa5a2239af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_510ed2e8-9eb4-4ed9-b532-78555c204f14" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_a803279f-60f1-4f55-9005-e0fa5a2239af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a803279f-60f1-4f55-9005-e0fa5a2239af_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a803279f-60f1-4f55-9005-e0fa5a2239af" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a803279f-60f1-4f55-9005-e0fa5a2239af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_98c61e65-972a-417b-9478-2604de009cfd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_a803279f-60f1-4f55-9005-e0fa5a2239af" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_98c61e65-972a-417b-9478-2604de009cfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a5ccc0fb-856e-469f-8455-5ec49e776249" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_98c61e65-972a-417b-9478-2604de009cfd" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a5ccc0fb-856e-469f-8455-5ec49e776249" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_ae747a5d-5d50-4791-8825-f1592bd5fe23" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_98c61e65-972a-417b-9478-2604de009cfd" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_ae747a5d-5d50-4791-8825-f1592bd5fe23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_53a15cb5-6482-427f-80a6-d0edbe1f830c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_98c61e65-972a-417b-9478-2604de009cfd" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_53a15cb5-6482-427f-80a6-d0edbe1f830c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_272c1f6a-e647-46a9-8be1-ece162af62a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_510ed2e8-9eb4-4ed9-b532-78555c204f14" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_272c1f6a-e647-46a9-8be1-ece162af62a9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_272c1f6a-e647-46a9-8be1-ece162af62a9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_272c1f6a-e647-46a9-8be1-ece162af62a9" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_272c1f6a-e647-46a9-8be1-ece162af62a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_4f17994a-b90b-4ece-8533-7c04745846ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_272c1f6a-e647-46a9-8be1-ece162af62a9" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_4f17994a-b90b-4ece-8533-7c04745846ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_b064b4aa-06f1-4199-a0e5-ca16622f1e99" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_4f17994a-b90b-4ece-8533-7c04745846ce" xlink:to="loc_us-gaap_MoneyMarketFundsMember_b064b4aa-06f1-4199-a0e5-ca16622f1e99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankTimeDepositsMember_af75bf3a-c5d8-4c92-bd48-795394894857" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BankTimeDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_4f17994a-b90b-4ece-8533-7c04745846ce" xlink:to="loc_us-gaap_BankTimeDepositsMember_af75bf3a-c5d8-4c92-bd48-795394894857" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CreditFacilityAndDebt" xlink:type="simple" xlink:href="avnw-20200703.xsd#CreditFacilityAndDebt"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CreditFacilityAndDebt" xlink:type="extended" id="i8c89d0a62f5c4032904fffa9f860eac9_CreditFacilityAndDebt"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CreditFacilityandDebtDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#CreditFacilityandDebtDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CreditFacilityandDebtDetails" xlink:type="extended" id="ic800594f8ba740ea87e48100f0453056_CreditFacilityandDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_bb973127-fce2-4665-a442-d3f48da4f6db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_bb973127-fce2-4665-a442-d3f48da4f6db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_787eed2d-65d7-4f2a-8fe2-67c49cf3adf0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_787eed2d-65d7-4f2a-8fe2-67c49cf3adf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_0387f575-464d-4466-aedb-93ddd4a5aae4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_0387f575-464d-4466-aedb-93ddd4a5aae4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_1dafaecc-ea75-4441-9ac6-324126f359b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_ShortTermBorrowings_1dafaecc-ea75-4441-9ac6-324126f359b3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_1c2575db-c600-4e7f-a4a4-32dd74f35b63" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_1c2575db-c600-4e7f-a4a4-32dd74f35b63" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0d6e06e7-b24b-47a2-84cb-3ed6051d182a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0d6e06e7-b24b-47a2-84cb-3ed6051d182a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_fb857ef2-39a8-48e6-981a-068dfd8d6c6b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_fb857ef2-39a8-48e6-981a-068dfd8d6c6b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentDebtDefaultBasisSpreadonApplicableInterestRate_35ae55b8-5feb-4f0e-97f9-f793fb2ec74b" xlink:href="avnw-20200703.xsd#avnw_DebtInstrumentDebtDefaultBasisSpreadonApplicableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_avnw_DebtInstrumentDebtDefaultBasisSpreadonApplicableInterestRate_35ae55b8-5feb-4f0e-97f9-f793fb2ec74b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfShortTermDebt_5b81f8e8-4c18-4706-bf7e-1a2060f03584" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepaymentsOfShortTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_RepaymentsOfShortTermDebt_5b81f8e8-4c18-4706-bf7e-1a2060f03584" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_6db05975-6b82-4e71-b79d-7ff472c01000" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_6db05975-6b82-4e71-b79d-7ff472c01000" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromNotesPayable_35ad0ca3-6f02-4c1c-a113-42e92ffb1833" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_ProceedsFromNotesPayable_35ad0ca3-6f02-4c1c-a113-42e92ffb1833" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c3c0a8-3232-434c-a37c-7d498eb2b8c0" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_7e89907a-dffc-4c98-aceb-b849b509542d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:to="loc_srt_StatementGeographicalAxis_7e89907a-dffc-4c98-aceb-b849b509542d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_7e89907a-dffc-4c98-aceb-b849b509542d_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_7e89907a-dffc-4c98-aceb-b849b509542d" xlink:to="loc_srt_SegmentGeographicalDomain_7e89907a-dffc-4c98-aceb-b849b509542d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_0389badd-b03d-4fb2-9da5-a3c8a1ab20cc" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_7e89907a-dffc-4c98-aceb-b849b509542d" xlink:to="loc_srt_SegmentGeographicalDomain_0389badd-b03d-4fb2-9da5-a3c8a1ab20cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SG_91b498bf-662f-4a50-ab88-3be684accf9c" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_SG"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0389badd-b03d-4fb2-9da5-a3c8a1ab20cc" xlink:to="loc_country_SG_91b498bf-662f-4a50-ab88-3be684accf9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_NZ_92653cdf-7190-4777-abf9-61977e02927d" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_NZ"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0389badd-b03d-4fb2-9da5-a3c8a1ab20cc" xlink:to="loc_country_NZ_92653cdf-7190-4777-abf9-61977e02927d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_756183b3-3ef1-45b7-82ab-039a2221c8ba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:to="loc_us-gaap_VariableRateAxis_756183b3-3ef1-45b7-82ab-039a2221c8ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_756183b3-3ef1-45b7-82ab-039a2221c8ba_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_756183b3-3ef1-45b7-82ab-039a2221c8ba" xlink:to="loc_us-gaap_VariableRateDomain_756183b3-3ef1-45b7-82ab-039a2221c8ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_3ff0119d-2785-4271-b6c3-180d4bd0c15a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_756183b3-3ef1-45b7-82ab-039a2221c8ba" xlink:to="loc_us-gaap_VariableRateDomain_3ff0119d-2785-4271-b6c3-180d4bd0c15a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrimeRateMember_6c139c17-37c2-4a24-874c-02ad954097d6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrimeRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3ff0119d-2785-4271-b6c3-180d4bd0c15a" xlink:to="loc_us-gaap_PrimeRateMember_6c139c17-37c2-4a24-874c-02ad954097d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_122488be-8df9-42c2-b98b-37c04b72d63a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3ff0119d-2785-4271-b6c3-180d4bd0c15a" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_122488be-8df9-42c2-b98b-37c04b72d63a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_PrimeRateOrLIBORRateMember_55ede3c4-583f-48ca-8cd3-159be9f639a3" xlink:href="avnw-20200703.xsd#avnw_PrimeRateOrLIBORRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3ff0119d-2785-4271-b6c3-180d4bd0c15a" xlink:to="loc_avnw_PrimeRateOrLIBORRateMember_55ede3c4-583f-48ca-8cd3-159be9f639a3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_b45bf963-a1b0-4148-9945-5edfe1897d2a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:to="loc_us-gaap_DebtInstrumentAxis_b45bf963-a1b0-4148-9945-5edfe1897d2a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b45bf963-a1b0-4148-9945-5edfe1897d2a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_b45bf963-a1b0-4148-9945-5edfe1897d2a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b45bf963-a1b0-4148-9945-5edfe1897d2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_459eac1e-4cdb-43d5-9c2b-0946466e83d8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_b45bf963-a1b0-4148-9945-5edfe1897d2a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_459eac1e-4cdb-43d5-9c2b-0946466e83d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_SiliconValleyBankMember_36ffefd3-3f7e-4c06-b85f-953e9e560c4e" xlink:href="avnw-20200703.xsd#avnw_SiliconValleyBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_459eac1e-4cdb-43d5-9c2b-0946466e83d8" xlink:to="loc_avnw_SiliconValleyBankMember_36ffefd3-3f7e-4c06-b85f-953e9e560c4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_PaycheckProtectionProgramLoanCARESActMember_67da5028-3b00-4083-8e5a-ab72d30f381f" xlink:href="avnw-20200703.xsd#avnw_PaycheckProtectionProgramLoanCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_459eac1e-4cdb-43d5-9c2b-0946466e83d8" xlink:to="loc_avnw_PaycheckProtectionProgramLoanCARESActMember_67da5028-3b00-4083-8e5a-ab72d30f381f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_BankOfNewZealandMember_a05c9abc-0896-4f57-887e-67922fbeb2cf" xlink:href="avnw-20200703.xsd#avnw_BankOfNewZealandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_459eac1e-4cdb-43d5-9c2b-0946466e83d8" xlink:to="loc_avnw_BankOfNewZealandMember_a05c9abc-0896-4f57-887e-67922fbeb2cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d873670f-a9a3-486c-bf16-6ebd3d83d733" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:to="loc_srt_RangeAxis_d873670f-a9a3-486c-bf16-6ebd3d83d733" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d873670f-a9a3-486c-bf16-6ebd3d83d733_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d873670f-a9a3-486c-bf16-6ebd3d83d733" xlink:to="loc_srt_RangeMember_d873670f-a9a3-486c-bf16-6ebd3d83d733_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3a6e2605-3c11-44c2-9a79-20c13b9b3f44" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d873670f-a9a3-486c-bf16-6ebd3d83d733" xlink:to="loc_srt_RangeMember_3a6e2605-3c11-44c2-9a79-20c13b9b3f44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_138f8ab7-bd73-4a72-9e19-44bdda7f79dc" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3a6e2605-3c11-44c2-9a79-20c13b9b3f44" xlink:to="loc_srt_MaximumMember_138f8ab7-bd73-4a72-9e19-44bdda7f79dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_9dfb5dbc-28fd-4870-ace4-6739ded296d7" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3a6e2605-3c11-44c2-9a79-20c13b9b3f44" xlink:to="loc_srt_MinimumMember_9dfb5dbc-28fd-4870-ace4-6739ded296d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_6d25743d-b78e-4199-84f4-9b2714fec91c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:to="loc_us-gaap_CreditFacilityAxis_6d25743d-b78e-4199-84f4-9b2714fec91c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_6d25743d-b78e-4199-84f4-9b2714fec91c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_6d25743d-b78e-4199-84f4-9b2714fec91c" xlink:to="loc_us-gaap_CreditFacilityDomain_6d25743d-b78e-4199-84f4-9b2714fec91c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_1a739210-1f82-4eeb-85d4-7638fa2b5194" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_6d25743d-b78e-4199-84f4-9b2714fec91c" xlink:to="loc_us-gaap_CreditFacilityDomain_1a739210-1f82-4eeb-85d4-7638fa2b5194" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_61ebb2e0-e03a-46ed-98fb-3bbfe7527b62" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1a739210-1f82-4eeb-85d4-7638fa2b5194" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_61ebb2e0-e03a-46ed-98fb-3bbfe7527b62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_f5626f23-0d88-43c1-a15c-dd85859900d6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignLineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1a739210-1f82-4eeb-85d4-7638fa2b5194" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_f5626f23-0d88-43c1-a15c-dd85859900d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_4f28925f-50ba-43e4-8b55-775beb9975c4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1a739210-1f82-4eeb-85d4-7638fa2b5194" xlink:to="loc_us-gaap_LetterOfCreditMember_4f28925f-50ba-43e4-8b55-775beb9975c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_b37781c2-ba5c-4b85-9525-489ac280ab66" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_1a739210-1f82-4eeb-85d4-7638fa2b5194" xlink:to="loc_us-gaap_LineOfCreditMember_b37781c2-ba5c-4b85-9525-489ac280ab66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_e2705a4d-5be5-41f5-8628-092ae03b1c58" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_e3fee37f-462c-4621-9f84-2072112449da" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_e2705a4d-5be5-41f5-8628-092ae03b1c58" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_e2705a4d-5be5-41f5-8628-092ae03b1c58_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_e2705a4d-5be5-41f5-8628-092ae03b1c58" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_e2705a4d-5be5-41f5-8628-092ae03b1c58_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_a2106597-702b-4b0f-8e3d-d0314b72a7d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_e2705a4d-5be5-41f5-8628-092ae03b1c58" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_a2106597-702b-4b0f-8e3d-d0314b72a7d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_549e8c17-2fa8-49ba-bac0-a4808d545444" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_a2106597-702b-4b0f-8e3d-d0314b72a7d7" xlink:to="loc_us-gaap_SubsequentEventMember_549e8c17-2fa8-49ba-bac0-a4808d545444" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RestructuringActivities" xlink:type="simple" xlink:href="avnw-20200703.xsd#RestructuringActivities"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RestructuringActivities" xlink:type="extended" id="ida14322d5e8f4c01b8057662f647f5ce_RestructuringActivities"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RestructuringActivitiesTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#RestructuringActivitiesTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RestructuringActivitiesTables" xlink:type="extended" id="i88476839f8b3464f91a660f20ddfd741_RestructuringActivitiesTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RestructuringActivitiesRestructuringLiabilityDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#RestructuringActivitiesRestructuringLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RestructuringActivitiesRestructuringLiabilityDetails" xlink:type="extended" id="ie757e099eed14608849603f2f1bd295c_RestructuringActivitiesRestructuringLiabilityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_2ff3efde-9127-4c1c-a386-72f4ebe8d70e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_82b8d0df-e1ec-44af-a35b-a82701934702" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_2ff3efde-9127-4c1c-a386-72f4ebe8d70e" xlink:to="loc_us-gaap_RestructuringReserveRollForward_82b8d0df-e1ec-44af-a35b-a82701934702" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_15923bbe-7882-4300-97de-4e0301058190" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_82b8d0df-e1ec-44af-a35b-a82701934702" xlink:to="loc_us-gaap_RestructuringReserve_15923bbe-7882-4300-97de-4e0301058190" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReservePeriodIncreaseDecrease_7617d8f7-520c-4e0c-bb06-c2f1cfd2d5c7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringReservePeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_82b8d0df-e1ec-44af-a35b-a82701934702" xlink:to="loc_us-gaap_RestructuringReservePeriodIncreaseDecrease_7617d8f7-520c-4e0c-bb06-c2f1cfd2d5c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_e408645b-2125-4d90-a12a-3765e8bca017" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_82b8d0df-e1ec-44af-a35b-a82701934702" xlink:to="loc_us-gaap_PaymentsForRestructuring_e408645b-2125-4d90-a12a-3765e8bca017" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveTranslationAdjustment_a88cce6d-6bcf-4146-852a-0f1dd8af92b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringReserveTranslationAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_82b8d0df-e1ec-44af-a35b-a82701934702" xlink:to="loc_us-gaap_RestructuringReserveTranslationAdjustment_a88cce6d-6bcf-4146-852a-0f1dd8af92b8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_85dd6a00-9038-4b1b-aaac-51674610b157" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveCurrent_836bf7ee-eda7-4baa-aa11-a06a1a4355c3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringReserveCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_2ff3efde-9127-4c1c-a386-72f4ebe8d70e" xlink:to="loc_us-gaap_RestructuringReserveCurrent_836bf7ee-eda7-4baa-aa11-a06a1a4355c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveSettledWithoutCash2_390426ce-0f8e-4171-8cbf-7826d7093c27" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringReserveSettledWithoutCash2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_2ff3efde-9127-4c1c-a386-72f4ebe8d70e" xlink:to="loc_us-gaap_RestructuringReserveSettledWithoutCash2_390426ce-0f8e-4171-8cbf-7826d7093c27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_15f16352-3d15-4507-bee0-e6e93aefe316" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_2ff3efde-9127-4c1c-a386-72f4ebe8d70e" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_15f16352-3d15-4507-bee0-e6e93aefe316" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_f978a6a0-e649-46c5-b7f6-437c419d3f7a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_15f16352-3d15-4507-bee0-e6e93aefe316" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_f978a6a0-e649-46c5-b7f6-437c419d3f7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_f978a6a0-e649-46c5-b7f6-437c419d3f7a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_f978a6a0-e649-46c5-b7f6-437c419d3f7a" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_f978a6a0-e649-46c5-b7f6-437c419d3f7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_da688077-2a8d-4ab9-ba33-85edee6a9c16" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_f978a6a0-e649-46c5-b7f6-437c419d3f7a" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_da688077-2a8d-4ab9-ba33-85edee6a9c16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_99518c83-0ce3-4c92-942a-cdd93f2197b1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_da688077-2a8d-4ab9-ba33-85edee6a9c16" xlink:to="loc_us-gaap_EmployeeSeveranceMember_99518c83-0ce3-4c92-942a-cdd93f2197b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FacilityClosingMember_4e7a03c8-c6e7-4c8c-960c-5c21f44cd0ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FacilityClosingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_da688077-2a8d-4ab9-ba33-85edee6a9c16" xlink:to="loc_us-gaap_FacilityClosingMember_4e7a03c8-c6e7-4c8c-960c-5c21f44cd0ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_4513ad6e-0c07-455f-9448-047fbc7badfc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_15f16352-3d15-4507-bee0-e6e93aefe316" xlink:to="loc_us-gaap_RestructuringPlanAxis_4513ad6e-0c07-455f-9448-047fbc7badfc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_4513ad6e-0c07-455f-9448-047fbc7badfc_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_4513ad6e-0c07-455f-9448-047fbc7badfc" xlink:to="loc_us-gaap_RestructuringPlanDomain_4513ad6e-0c07-455f-9448-047fbc7badfc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_4513ad6e-0c07-455f-9448-047fbc7badfc" xlink:to="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_QuarterFourTwoThousandTwentyPlanMember_411adc25-c313-4057-96e9-7bbf4d7dc0d5" xlink:href="avnw-20200703.xsd#avnw_QuarterFourTwoThousandTwentyPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:to="loc_avnw_QuarterFourTwoThousandTwentyPlanMember_411adc25-c313-4057-96e9-7bbf4d7dc0d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_QuarterThreeTwoThousandTwentyPlanMember_86072581-bcc8-4c89-83d1-8daa52f6d62f" xlink:href="avnw-20200703.xsd#avnw_QuarterThreeTwoThousandTwentyPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:to="loc_avnw_QuarterThreeTwoThousandTwentyPlanMember_86072581-bcc8-4c89-83d1-8daa52f6d62f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_FiscalTwoThousandTwentyPlanMember_4f0eb4ab-58ed-498d-8029-b678f9e34b0a" xlink:href="avnw-20200703.xsd#avnw_FiscalTwoThousandTwentyPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:to="loc_avnw_FiscalTwoThousandTwentyPlanMember_4f0eb4ab-58ed-498d-8029-b678f9e34b0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_FiscalThousandEighteenToNineteenPlanMember_a326b5f4-35b8-4ca7-91a8-17bdc7f8b41e" xlink:href="avnw-20200703.xsd#avnw_FiscalThousandEighteenToNineteenPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:to="loc_avnw_FiscalThousandEighteenToNineteenPlanMember_a326b5f4-35b8-4ca7-91a8-17bdc7f8b41e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_PriorYearsPlansMember_650304b2-dc62-4be9-88a0-bc79f9dfbfa0" xlink:href="avnw-20200703.xsd#avnw_PriorYearsPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:to="loc_avnw_PriorYearsPlansMember_650304b2-dc62-4be9-88a0-bc79f9dfbfa0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_FiscalTwoThousandFifteenSixteenPlanMember_e95ac84c-1326-401f-8273-dd106f35b6b3" xlink:href="avnw-20200703.xsd#avnw_FiscalTwoThousandFifteenSixteenPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_5494cdc5-bece-4919-a356-f8c728a561a4" xlink:to="loc_avnw_FiscalTwoThousandFifteenSixteenPlanMember_e95ac84c-1326-401f-8273-dd106f35b6b3" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquity" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquity" xlink:type="extended" id="i272ac18683dd4c5da1ba92be834dedee_StockholdersEquity"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityTables" xlink:type="extended" id="ic11934cb313f4d3fb5e12c76808d4cc9_StockholdersEquityTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityNarrativeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityNarrativeDetails" xlink:type="extended" id="i5ffd05938a1941e581a59bd335e2f4ca_StockholdersEquityNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_13f5402f-dba1-4110-8fa7-324fa35da99b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_13f5402f-dba1-4110-8fa7-324fa35da99b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofStockIncentivePlans_50891bc1-0d45-4ee7-b17e-4abd1a08712c" xlink:href="avnw-20200703.xsd#avnw_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofStockIncentivePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_avnw_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofStockIncentivePlans_50891bc1-0d45-4ee7-b17e-4abd1a08712c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_45740bf8-9fc1-4714-a5d1-045223dc2f50" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_45740bf8-9fc1-4714-a5d1-045223dc2f50" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_b8e40dcd-d311-4b58-8cfb-59d9a4dec84a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_b8e40dcd-d311-4b58-8cfb-59d9a4dec84a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5c637970-b0c4-46b9-a99a-c76a9b47a632" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5c637970-b0c4-46b9-a99a-c76a9b47a632" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_4b486242-3822-4e0a-8660-760479b9482b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_4b486242-3822-4e0a-8660-760479b9482b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ClassofWarrantorRightNumberofRightsAsDividendDeclaredForEachShareofCommonStock_73ad7b97-5243-4ac3-85af-028e5e2a7f66" xlink:href="avnw-20200703.xsd#avnw_ClassofWarrantorRightNumberofRightsAsDividendDeclaredForEachShareofCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_avnw_ClassofWarrantorRightNumberofRightsAsDividendDeclaredForEachShareofCommonStock_73ad7b97-5243-4ac3-85af-028e5e2a7f66" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_f7141973-cd9d-4f03-93e8-988399ec99ff" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_f7141973-cd9d-4f03-93e8-988399ec99ff" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_130a85a5-f21f-4c6a-acc0-a300a2a6b923" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_130a85a5-f21f-4c6a-acc0-a300a2a6b923" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_c1f69301-3336-486e-a36b-36649d827d08" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_c1f69301-3336-486e-a36b-36649d827d08" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_af112246-a3c5-4e2f-8217-7d19c5c13a1f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_af112246-a3c5-4e2f-8217-7d19c5c13a1f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_5a1e2063-b5ce-4ab5-ba18-1db493af241c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_5a1e2063-b5ce-4ab5-ba18-1db493af241c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeStockPurchasePlanPurchaseSharesPurchasePeriod_c90d7732-09c4-4121-9681-9641cc8b8a32" xlink:href="avnw-20200703.xsd#avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeStockPurchasePlanPurchaseSharesPurchasePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeStockPurchasePlanPurchaseSharesPurchasePeriod_c90d7732-09c4-4121-9681-9641cc8b8a32" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_f4ae3b8b-3a5a-458d-9769-cc5852dd6f34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_f4ae3b8b-3a5a-458d-9769-cc5852dd6f34" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardClosingPriceOfCommonStock_086e4085-98f0-4d80-9e6b-f724dd1196d9" xlink:href="avnw-20200703.xsd#avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardClosingPriceOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardClosingPriceOfCommonStock_086e4085-98f0-4d80-9e6b-f724dd1196d9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_e024de0c-56c4-4fc1-84f0-cfff43f9889a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_e024de0c-56c4-4fc1-84f0-cfff43f9889a" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f80c394f-99fe-488f-acb5-2902b727e212" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_c6938aaf-5f9d-4b58-9c18-3830acf6f587" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_c6938aaf-5f9d-4b58-9c18-3830acf6f587" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_c6938aaf-5f9d-4b58-9c18-3830acf6f587_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_c6938aaf-5f9d-4b58-9c18-3830acf6f587" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_c6938aaf-5f9d-4b58-9c18-3830acf6f587_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_633ab209-6b9a-4451-b6eb-589034e7ec36" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_c6938aaf-5f9d-4b58-9c18-3830acf6f587" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_633ab209-6b9a-4451-b6eb-589034e7ec36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsSubjectToMandatoryRedemptionMember_0563b642-94ec-443a-ab0c-1bd1b037ca0f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WarrantsAndRightsSubjectToMandatoryRedemptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_633ab209-6b9a-4451-b6eb-589034e7ec36" xlink:to="loc_us-gaap_WarrantsAndRightsSubjectToMandatoryRedemptionMember_0563b642-94ec-443a-ab0c-1bd1b037ca0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_9d15b9b4-3ff6-4d1d-8259-cb4094d77f1d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:to="loc_us-gaap_StatementClassOfStockAxis_9d15b9b4-3ff6-4d1d-8259-cb4094d77f1d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_9d15b9b4-3ff6-4d1d-8259-cb4094d77f1d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9d15b9b4-3ff6-4d1d-8259-cb4094d77f1d" xlink:to="loc_us-gaap_ClassOfStockDomain_9d15b9b4-3ff6-4d1d-8259-cb4094d77f1d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_2c08a9c4-08b6-4d9f-a5f5-3b070a30df64" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9d15b9b4-3ff6-4d1d-8259-cb4094d77f1d" xlink:to="loc_us-gaap_ClassOfStockDomain_2c08a9c4-08b6-4d9f-a5f5-3b070a30df64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_60b29016-4216-46a2-bbf0-374b338e0370" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2c08a9c4-08b6-4d9f-a5f5-3b070a30df64" xlink:to="loc_us-gaap_CommonStockMember_60b29016-4216-46a2-bbf0-374b338e0370" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_f0552bfe-5493-4fe2-9f27-93c19d8ca781" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2c08a9c4-08b6-4d9f-a5f5-3b070a30df64" xlink:to="loc_us-gaap_PreferredStockMember_f0552bfe-5493-4fe2-9f27-93c19d8ca781" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a49bedf7-1485-4330-9f9d-20df86664c11" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:to="loc_srt_RangeAxis_a49bedf7-1485-4330-9f9d-20df86664c11" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a49bedf7-1485-4330-9f9d-20df86664c11_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a49bedf7-1485-4330-9f9d-20df86664c11" xlink:to="loc_srt_RangeMember_a49bedf7-1485-4330-9f9d-20df86664c11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_43eed3ec-6537-4004-a4e3-5c566260c33d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a49bedf7-1485-4330-9f9d-20df86664c11" xlink:to="loc_srt_RangeMember_43eed3ec-6537-4004-a4e3-5c566260c33d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a225d570-e63e-4324-bb0d-15762c27f4fb" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_43eed3ec-6537-4004-a4e3-5c566260c33d" xlink:to="loc_srt_MinimumMember_a225d570-e63e-4324-bb0d-15762c27f4fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_f1c57b41-0a71-407f-abf7-1ca51628a55d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:to="loc_us-gaap_PlanNameAxis_f1c57b41-0a71-407f-abf7-1ca51628a55d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_f1c57b41-0a71-407f-abf7-1ca51628a55d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_f1c57b41-0a71-407f-abf7-1ca51628a55d" xlink:to="loc_us-gaap_PlanNameDomain_f1c57b41-0a71-407f-abf7-1ca51628a55d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_358cf16e-7b3b-4a2a-a034-1af45b818599" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_f1c57b41-0a71-407f-abf7-1ca51628a55d" xlink:to="loc_us-gaap_PlanNameDomain_358cf16e-7b3b-4a2a-a034-1af45b818599" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_A2018StockPlanMember_c310a0b4-5b91-4f10-a87d-e95c0869e98c" xlink:href="avnw-20200703.xsd#avnw_A2018StockPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_358cf16e-7b3b-4a2a-a034-1af45b818599" xlink:to="loc_avnw_A2018StockPlanMember_c310a0b4-5b91-4f10-a87d-e95c0869e98c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_dfa7b47c-8995-4f03-979f-a2a76cb39193" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:to="loc_us-gaap_AwardTypeAxis_dfa7b47c-8995-4f03-979f-a2a76cb39193" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_dfa7b47c-8995-4f03-979f-a2a76cb39193_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_dfa7b47c-8995-4f03-979f-a2a76cb39193" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_dfa7b47c-8995-4f03-979f-a2a76cb39193_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_26935f6a-464e-490c-8e47-2e8481f7cdc1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_dfa7b47c-8995-4f03-979f-a2a76cb39193" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_26935f6a-464e-490c-8e47-2e8481f7cdc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_898e0118-5937-4cc9-9a4f-8eb849853cb9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_26935f6a-464e-490c-8e47-2e8481f7cdc1" xlink:to="loc_us-gaap_EmployeeStockOptionMember_898e0118-5937-4cc9-9a4f-8eb849853cb9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_15f14b40-694b-4ad1-8c33-d743a59c45aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_26935f6a-464e-490c-8e47-2e8481f7cdc1" xlink:to="loc_us-gaap_EmployeeStockMember_15f14b40-694b-4ad1-8c33-d743a59c45aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_8c6bd468-5a05-4634-85a8-b97424e8febd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_26935f6a-464e-490c-8e47-2e8481f7cdc1" xlink:to="loc_us-gaap_RestrictedStockMember_8c6bd468-5a05-4634-85a8-b97424e8febd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_bda5cba5-1075-4b3f-8fbe-5b1c26fe56bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_15002879-4eaf-4a6a-a574-95eb74f2a60b" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_bda5cba5-1075-4b3f-8fbe-5b1c26fe56bf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_bda5cba5-1075-4b3f-8fbe-5b1c26fe56bf_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_bda5cba5-1075-4b3f-8fbe-5b1c26fe56bf" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_bda5cba5-1075-4b3f-8fbe-5b1c26fe56bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_1dca29ef-39f5-4d8d-9068-85763ec37696" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_bda5cba5-1075-4b3f-8fbe-5b1c26fe56bf" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_1dca29ef-39f5-4d8d-9068-85763ec37696" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ShareRepurchaseProgramMember_17aacdf2-6a1c-4ba3-995f-45fc08729f4a" xlink:href="avnw-20200703.xsd#avnw_ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_1dca29ef-39f5-4d8d-9068-85763ec37696" xlink:to="loc_avnw_ShareRepurchaseProgramMember_17aacdf2-6a1c-4ba3-995f-45fc08729f4a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityRepurchaseofCommonStockDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityRepurchaseofCommonStockDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityRepurchaseofCommonStockDetails" xlink:type="extended" id="i3218e803a5054c0f816352730b4fc2d5_StockholdersEquityRepurchaseofCommonStockDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityClassOfTreasuryStockLineItems_d75dfea5-7d79-4ba5-bfca-027506b7a87f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityClassOfTreasuryStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_96739606-0aad-4b4c-bbcb-2ad352a8385e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_d75dfea5-7d79-4ba5-bfca-027506b7a87f" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_96739606-0aad-4b4c-bbcb-2ad352a8385e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_58887f5e-5db0-4cbc-8119-8ed0220b17a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_d75dfea5-7d79-4ba5-bfca-027506b7a87f" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_58887f5e-5db0-4cbc-8119-8ed0220b17a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCarryingBasis_b01c8eaa-f9a1-43b9-8018-8c8c64347ca1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockCarryingBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_d75dfea5-7d79-4ba5-bfca-027506b7a87f" xlink:to="loc_us-gaap_TreasuryStockCarryingBasis_b01c8eaa-f9a1-43b9-8018-8c8c64347ca1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_1c9e0969-b193-4e61-9798-a6c23aad9efd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_d75dfea5-7d79-4ba5-bfca-027506b7a87f" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_1c9e0969-b193-4e61-9798-a6c23aad9efd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfTreasuryStockTable_8bcf520c-7d64-4b0c-b9fa-b9304a974d00" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfTreasuryStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EquityClassOfTreasuryStockLineItems_d75dfea5-7d79-4ba5-bfca-027506b7a87f" xlink:to="loc_us-gaap_ClassOfTreasuryStockTable_8bcf520c-7d64-4b0c-b9fa-b9304a974d00" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_0994b6e4-c2b6-47be-b136-76d33b5901fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfTreasuryStockTable_8bcf520c-7d64-4b0c-b9fa-b9304a974d00" xlink:to="loc_us-gaap_StatementClassOfStockAxis_0994b6e4-c2b6-47be-b136-76d33b5901fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_0994b6e4-c2b6-47be-b136-76d33b5901fd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_0994b6e4-c2b6-47be-b136-76d33b5901fd" xlink:to="loc_us-gaap_ClassOfStockDomain_0994b6e4-c2b6-47be-b136-76d33b5901fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_6e418d91-d8e6-4abd-8fc8-3261a46e4c7f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_0994b6e4-c2b6-47be-b136-76d33b5901fd" xlink:to="loc_us-gaap_ClassOfStockDomain_6e418d91-d8e6-4abd-8fc8-3261a46e4c7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_323f2a54-11b5-4679-a04a-8dad6219a5b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_6e418d91-d8e6-4abd-8fc8-3261a46e4c7f" xlink:to="loc_us-gaap_CommonStockMember_323f2a54-11b5-4679-a04a-8dad6219a5b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_47ea6b8f-ca0f-46f3-81c2-dd6435728e11" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfTreasuryStockTable_8bcf520c-7d64-4b0c-b9fa-b9304a974d00" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_47ea6b8f-ca0f-46f3-81c2-dd6435728e11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_47ea6b8f-ca0f-46f3-81c2-dd6435728e11_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_47ea6b8f-ca0f-46f3-81c2-dd6435728e11" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_47ea6b8f-ca0f-46f3-81c2-dd6435728e11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_b974260c-311f-4a86-8a3d-4bc48ae4ff1e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_47ea6b8f-ca0f-46f3-81c2-dd6435728e11" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_b974260c-311f-4a86-8a3d-4bc48ae4ff1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ShareRepurchaseProgramMember_cb414d10-2824-4d11-80b6-327906a34a50" xlink:href="avnw-20200703.xsd#avnw_ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_b974260c-311f-4a86-8a3d-4bc48ae4ff1e" xlink:to="loc_avnw_ShareRepurchaseProgramMember_cb414d10-2824-4d11-80b6-327906a34a50" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityStockBasedCompensationExpenseDetails" xlink:type="extended" id="i89003cbc719140ceb5a05dd9146ce58c_StockholdersEquityStockBasedCompensationExpenseDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43d61356-797d-4886-8d67-4a3dfb36934d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_7399d1c5-72ab-4d18-adcf-7d9a9f85f6ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43d61356-797d-4886-8d67-4a3dfb36934d" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_7399d1c5-72ab-4d18-adcf-7d9a9f85f6ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_919adeb4-7653-4e15-a7c1-a7d4b749151b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_43d61356-797d-4886-8d67-4a3dfb36934d" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_919adeb4-7653-4e15-a7c1-a7d4b749151b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_92bfde1a-c21f-418d-854c-5a32290ff2aa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_919adeb4-7653-4e15-a7c1-a7d4b749151b" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_92bfde1a-c21f-418d-854c-5a32290ff2aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_92bfde1a-c21f-418d-854c-5a32290ff2aa_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_92bfde1a-c21f-418d-854c-5a32290ff2aa" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_92bfde1a-c21f-418d-854c-5a32290ff2aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_5ceb2785-9300-4cfb-a2b8-1965fd6e27dd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_92bfde1a-c21f-418d-854c-5a32290ff2aa" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_5ceb2785-9300-4cfb-a2b8-1965fd6e27dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_f62efd58-3da7-42ee-a82e-400882fe713c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5ceb2785-9300-4cfb-a2b8-1965fd6e27dd" xlink:to="loc_us-gaap_CostOfSalesMember_f62efd58-3da7-42ee-a82e-400882fe713c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_74dc09c6-bd04-4d8c-8602-ba0b196495bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5ceb2785-9300-4cfb-a2b8-1965fd6e27dd" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_74dc09c6-bd04-4d8c-8602-ba0b196495bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_77db7863-70f1-4659-ac3f-ef0f6d79fbfe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_5ceb2785-9300-4cfb-a2b8-1965fd6e27dd" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_77db7863-70f1-4659-ac3f-ef0f6d79fbfe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_6deb2bf5-00b3-43f7-b108-14eee7994699" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_919adeb4-7653-4e15-a7c1-a7d4b749151b" xlink:to="loc_us-gaap_AwardTypeAxis_6deb2bf5-00b3-43f7-b108-14eee7994699" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6deb2bf5-00b3-43f7-b108-14eee7994699_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_6deb2bf5-00b3-43f7-b108-14eee7994699" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6deb2bf5-00b3-43f7-b108-14eee7994699_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_083adf68-09cf-4057-b642-91ea849f036c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_6deb2bf5-00b3-43f7-b108-14eee7994699" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_083adf68-09cf-4057-b642-91ea849f036c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_9f5c6892-5e8a-4c65-bf7a-9bfc00b1467d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_083adf68-09cf-4057-b642-91ea849f036c" xlink:to="loc_us-gaap_EmployeeStockOptionMember_9f5c6892-5e8a-4c65-bf7a-9bfc00b1467d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_aebdeacc-bec3-4319-9733-10e346605839" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_083adf68-09cf-4057-b642-91ea849f036c" xlink:to="loc_us-gaap_RestrictedStockMember_aebdeacc-bec3-4319-9733-10e346605839" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_4969c64b-b5c0-4f55-9f0e-b3779188949f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_083adf68-09cf-4057-b642-91ea849f036c" xlink:to="loc_us-gaap_PerformanceSharesMember_4969c64b-b5c0-4f55-9f0e-b3779188949f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityUnamortizedExpensesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityUnamortizedExpensesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityUnamortizedExpensesDetails" xlink:type="extended" id="ib5a6c5659ba04c73ade9b90cb3bff0d8_StockholdersEquityUnamortizedExpensesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a2eee647-ec96-43e3-ad5e-cf40ce4f5d2d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_eaea7c18-8aa8-44b1-9d64-e7485b27a2f0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a2eee647-ec96-43e3-ad5e-cf40ce4f5d2d" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_eaea7c18-8aa8-44b1-9d64-e7485b27a2f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_dbb00ba3-2075-47cb-930d-3edfd3f5cc78" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a2eee647-ec96-43e3-ad5e-cf40ce4f5d2d" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_dbb00ba3-2075-47cb-930d-3edfd3f5cc78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5f4d82f0-ab01-4b33-a680-30b7a047c446" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a2eee647-ec96-43e3-ad5e-cf40ce4f5d2d" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5f4d82f0-ab01-4b33-a680-30b7a047c446" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_cb2d3235-94c7-4093-ba18-fb365f72b250" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5f4d82f0-ab01-4b33-a680-30b7a047c446" xlink:to="loc_us-gaap_AwardTypeAxis_cb2d3235-94c7-4093-ba18-fb365f72b250" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cb2d3235-94c7-4093-ba18-fb365f72b250_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_cb2d3235-94c7-4093-ba18-fb365f72b250" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_cb2d3235-94c7-4093-ba18-fb365f72b250_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b8e1a856-a8c8-4ab6-9589-9dcb3095512c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_cb2d3235-94c7-4093-ba18-fb365f72b250" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b8e1a856-a8c8-4ab6-9589-9dcb3095512c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_cb75770e-6764-45fc-b95b-66c615b06922" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b8e1a856-a8c8-4ab6-9589-9dcb3095512c" xlink:to="loc_us-gaap_EmployeeStockOptionMember_cb75770e-6764-45fc-b95b-66c615b06922" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_d79fa786-3c57-4f69-b810-46a92391a6c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b8e1a856-a8c8-4ab6-9589-9dcb3095512c" xlink:to="loc_us-gaap_PerformanceSharesMember_d79fa786-3c57-4f69-b810-46a92391a6c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_5b30b908-13cf-494a-af04-d4d67bb5d982" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b8e1a856-a8c8-4ab6-9589-9dcb3095512c" xlink:to="loc_us-gaap_RestrictedStockMember_5b30b908-13cf-494a-af04-d4d67bb5d982" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityStockOptionActivityDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityStockOptionActivityDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityStockOptionActivityDetails" xlink:type="extended" id="ie3879ca30e0c41e9ae4618a9eb5823e7_StockholdersEquityStockOptionActivityDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityWeightedAverageAssumptionsDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityWeightedAverageAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityWeightedAverageAssumptionsDetails" xlink:type="extended" id="ic0506b042b63473ebe8fd42904494bb0_StockholdersEquityWeightedAverageAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_c566359e-417d-4f6b-81a3-3c021f99dbcb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_c566359e-417d-4f6b-81a3-3c021f99dbcb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_7a553a77-d680-48b5-8de3-0c68ef150519" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_7a553a77-d680-48b5-8de3-0c68ef150519" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_454827f0-334a-4cbd-8af4-c1724a645307" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_454827f0-334a-4cbd-8af4-c1724a645307" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_20c70cbc-5e91-4f21-aeb4-60fbcc6b42ba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_20c70cbc-5e91-4f21-aeb4-60fbcc6b42ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_505cb25e-e437-4fac-b12a-133154fb5b75" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_505cb25e-e437-4fac-b12a-133154fb5b75" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_9d7d259d-d38f-487b-ba6e-5785de2f5dcb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_9d7d259d-d38f-487b-ba6e-5785de2f5dcb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_17b9e48b-48e3-45c3-818e-13c2271bd0b7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7caa9d1f-a3ff-4ebd-b939-8cbb0fa33e20" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_17b9e48b-48e3-45c3-818e-13c2271bd0b7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_8891cd89-228e-4e81-a943-45484d2a1913" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_17b9e48b-48e3-45c3-818e-13c2271bd0b7" xlink:to="loc_us-gaap_AwardTypeAxis_8891cd89-228e-4e81-a943-45484d2a1913" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8891cd89-228e-4e81-a943-45484d2a1913_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8891cd89-228e-4e81-a943-45484d2a1913" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8891cd89-228e-4e81-a943-45484d2a1913_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da8936e2-e141-49a5-81ed-ac8bdce7141f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8891cd89-228e-4e81-a943-45484d2a1913" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da8936e2-e141-49a5-81ed-ac8bdce7141f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_6d4417e1-64db-43c8-bcd3-69c2b94c4d3a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da8936e2-e141-49a5-81ed-ac8bdce7141f" xlink:to="loc_us-gaap_EmployeeStockOptionMember_6d4417e1-64db-43c8-bcd3-69c2b94c4d3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_MarketBasedStockUnitsMSUMember_cc34fa3a-58cb-4ae8-9083-65cb7e2998a1" xlink:href="avnw-20200703.xsd#avnw_MarketBasedStockUnitsMSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_da8936e2-e141-49a5-81ed-ac8bdce7141f" xlink:to="loc_avnw_MarketBasedStockUnitsMSUMember_cc34fa3a-58cb-4ae8-9083-65cb7e2998a1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityOptionsbyExercisePriceRangeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityOptionsbyExercisePriceRangeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityOptionsbyExercisePriceRangeDetails" xlink:type="extended" id="ib8508ed8c63f47f2960af218026d2877_StockholdersEquityOptionsbyExercisePriceRangeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_be63308b-e528-4b93-b1d0-8d76318ddc29" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_be63308b-e528-4b93-b1d0-8d76318ddc29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_a6c4b34a-8daa-41c7-b5a0-e9d0e525a112" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_a6c4b34a-8daa-41c7-b5a0-e9d0e525a112" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_9f11dfde-565a-43dd-8f68-40c5a06ebb6a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_9f11dfde-565a-43dd-8f68-40c5a06ebb6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_20b33a20-abd3-4d6d-b504-cd2276d7cd7c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_20b33a20-abd3-4d6d-b504-cd2276d7cd7c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_a7c4e721-5f40-47de-8733-ac0b98faea51" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_a7c4e721-5f40-47de-8733-ac0b98faea51" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_58bd260e-d3ef-40d8-9f18-e4e9a8ba5b5d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_58bd260e-d3ef-40d8-9f18-e4e9a8ba5b5d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_ffc3b3e6-df66-4b57-8f7d-04736ee9128a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_ffc3b3e6-df66-4b57-8f7d-04736ee9128a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_0e49924d-b7b5-4738-8145-e5cd8c13e7ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_562d9326-90b1-4117-a7eb-03af4f15629a" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_0e49924d-b7b5-4738-8145-e5cd8c13e7ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2cf3761c-cda9-44bc-ad35-cc2113197b33" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_0e49924d-b7b5-4738-8145-e5cd8c13e7ce" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2cf3761c-cda9-44bc-ad35-cc2113197b33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2cf3761c-cda9-44bc-ad35-cc2113197b33_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2cf3761c-cda9-44bc-ad35-cc2113197b33" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2cf3761c-cda9-44bc-ad35-cc2113197b33_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2cf3761c-cda9-44bc-ad35-cc2113197b33" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range1Member_2ff67930-5857-4b69-8b83-032af29e65a0" xlink:href="avnw-20200703.xsd#avnw_Range1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range1Member_2ff67930-5857-4b69-8b83-032af29e65a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range2Member_31c0765c-1fd9-4732-8631-086e8009b44e" xlink:href="avnw-20200703.xsd#avnw_Range2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range2Member_31c0765c-1fd9-4732-8631-086e8009b44e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range3Member_c76cb8a5-d037-425a-885d-8e2275a98e57" xlink:href="avnw-20200703.xsd#avnw_Range3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range3Member_c76cb8a5-d037-425a-885d-8e2275a98e57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range4Member_004d5ba8-9671-4c59-b5ed-2c3359b20ca9" xlink:href="avnw-20200703.xsd#avnw_Range4Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range4Member_004d5ba8-9671-4c59-b5ed-2c3359b20ca9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range5Member_5f98ca40-0faa-4205-80ae-1ab67383037b" xlink:href="avnw-20200703.xsd#avnw_Range5Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range5Member_5f98ca40-0faa-4205-80ae-1ab67383037b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range6Member_d41d1d57-d6e2-4e20-9130-6a8779c9fc81" xlink:href="avnw-20200703.xsd#avnw_Range6Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range6Member_d41d1d57-d6e2-4e20-9130-6a8779c9fc81" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range7Member_6300e845-651c-4f92-af86-031bfffc494b" xlink:href="avnw-20200703.xsd#avnw_Range7Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range7Member_6300e845-651c-4f92-af86-031bfffc494b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_Range8Member_d934881f-2b0f-426f-b6de-2044a9652e01" xlink:href="avnw-20200703.xsd#avnw_Range8Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_4ff9e770-1e02-4f84-9236-094a94795a59" xlink:to="loc_avnw_Range8Member_d934881f-2b0f-426f-b6de-2044a9652e01" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityAdditionalOptionInformationDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityAdditionalOptionInformationDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityAdditionalOptionInformationDetails" xlink:type="extended" id="ia27ebef448584b9995e060f84b66ddc0_StockholdersEquityAdditionalOptionInformationDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityRestrictedStockActivityDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityRestrictedStockActivityDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityRestrictedStockActivityDetails" xlink:type="extended" id="i9e18aa86f70c4836bfde0821d026ce68_StockholdersEquityRestrictedStockActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e330f5e9-6b8a-4eba-b530-45587f04542c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c1e9bb89-a78a-4ca0-9b11-fed4c002a1cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e330f5e9-6b8a-4eba-b530-45587f04542c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c1e9bb89-a78a-4ca0-9b11-fed4c002a1cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_0592528a-01c5-45d4-bb09-35f48c9a94e5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c1e9bb89-a78a-4ca0-9b11-fed4c002a1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_0592528a-01c5-45d4-bb09-35f48c9a94e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_2e3aee04-8d12-47a5-ab51-a6524c063ed4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c1e9bb89-a78a-4ca0-9b11-fed4c002a1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_2e3aee04-8d12-47a5-ab51-a6524c063ed4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_86bdcf66-959e-492f-b927-ffc968a808a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c1e9bb89-a78a-4ca0-9b11-fed4c002a1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_86bdcf66-959e-492f-b927-ffc968a808a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_9d1feafe-3835-458b-8cf1-7d9328cbb4b5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_c1e9bb89-a78a-4ca0-9b11-fed4c002a1cc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_9d1feafe-3835-458b-8cf1-7d9328cbb4b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_a86ba2f9-7910-49ab-837e-71947a97fac1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_88269e54-a65c-4db0-adc7-8233964b9a7b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e330f5e9-6b8a-4eba-b530-45587f04542c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_88269e54-a65c-4db0-adc7-8233964b9a7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8ada3b74-2796-489c-8c09-ae02ad8d7d08" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_88269e54-a65c-4db0-adc7-8233964b9a7b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8ada3b74-2796-489c-8c09-ae02ad8d7d08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_04310ee0-4064-44df-a14e-39bc8f2af3d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_88269e54-a65c-4db0-adc7-8233964b9a7b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_04310ee0-4064-44df-a14e-39bc8f2af3d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_098d1c99-ebf9-48fb-91bf-b6a9e6ab56cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_88269e54-a65c-4db0-adc7-8233964b9a7b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_098d1c99-ebf9-48fb-91bf-b6a9e6ab56cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_dcc2d1d7-8aae-41ee-aed2-1e7b4b9dbfc5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_88269e54-a65c-4db0-adc7-8233964b9a7b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_dcc2d1d7-8aae-41ee-aed2-1e7b4b9dbfc5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2e95fc3f-5171-4ea0-ad12-1395f8ca867d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bbb60a20-ebcf-44ec-be09-94f124851e78" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_e330f5e9-6b8a-4eba-b530-45587f04542c" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bbb60a20-ebcf-44ec-be09-94f124851e78" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_52add9c0-254d-4e84-b820-f93ff431a5d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bbb60a20-ebcf-44ec-be09-94f124851e78" xlink:to="loc_us-gaap_AwardTypeAxis_52add9c0-254d-4e84-b820-f93ff431a5d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_52add9c0-254d-4e84-b820-f93ff431a5d7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_52add9c0-254d-4e84-b820-f93ff431a5d7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_52add9c0-254d-4e84-b820-f93ff431a5d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3ae9e78c-a41d-4065-a70f-68de99961f85" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_52add9c0-254d-4e84-b820-f93ff431a5d7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3ae9e78c-a41d-4065-a70f-68de99961f85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_553b7ac6-281d-4fc8-a7ce-37a12d9424b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3ae9e78c-a41d-4065-a70f-68de99961f85" xlink:to="loc_us-gaap_RestrictedStockMember_553b7ac6-281d-4fc8-a7ce-37a12d9424b9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityMarketBasedAwardsDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityMarketBasedAwardsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityMarketBasedAwardsDetails" xlink:type="extended" id="i7926e4201611438e86a95a05788e08b2_StockholdersEquityMarketBasedAwardsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7ce94c45-4fb9-4e4b-9a00-4174819dbe66" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_26e5f030-fb3b-4cc3-a432-03592c94d688" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7ce94c45-4fb9-4e4b-9a00-4174819dbe66" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_26e5f030-fb3b-4cc3-a432-03592c94d688" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4688b239-7af8-4f3f-a994-c98d9933582f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_26e5f030-fb3b-4cc3-a432-03592c94d688" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4688b239-7af8-4f3f-a994-c98d9933582f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_876a3792-60f1-4484-8d0a-1d8b4850aca3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_26e5f030-fb3b-4cc3-a432-03592c94d688" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_876a3792-60f1-4484-8d0a-1d8b4850aca3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d20bcb08-0d0e-4bd5-8d11-54e95db276af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_19d8ac41-4ce6-4a5d-8227-ee2d190c14db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7ce94c45-4fb9-4e4b-9a00-4174819dbe66" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_19d8ac41-4ce6-4a5d-8227-ee2d190c14db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_06dd4c39-de3f-4438-ac8c-57aa15b39b35" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_19d8ac41-4ce6-4a5d-8227-ee2d190c14db" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_06dd4c39-de3f-4438-ac8c-57aa15b39b35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_c775c3e6-3590-40df-98fd-be871ca394d0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_19d8ac41-4ce6-4a5d-8227-ee2d190c14db" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_c775c3e6-3590-40df-98fd-be871ca394d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3d6d6346-2674-4598-98a7-6b94a0155337" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae4016a8-1fdf-4ba1-8dcc-ded5ed6832b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7ce94c45-4fb9-4e4b-9a00-4174819dbe66" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae4016a8-1fdf-4ba1-8dcc-ded5ed6832b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_2cb6fe47-a195-4d13-8099-4cf278afd9ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ae4016a8-1fdf-4ba1-8dcc-ded5ed6832b3" xlink:to="loc_us-gaap_AwardTypeAxis_2cb6fe47-a195-4d13-8099-4cf278afd9ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2cb6fe47-a195-4d13-8099-4cf278afd9ef_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_2cb6fe47-a195-4d13-8099-4cf278afd9ef" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2cb6fe47-a195-4d13-8099-4cf278afd9ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f8c9d66d-98ba-4c3d-acdb-7fbd8240f3d8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_2cb6fe47-a195-4d13-8099-4cf278afd9ef" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f8c9d66d-98ba-4c3d-acdb-7fbd8240f3d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_MarketBasedStockUnitsMSUMember_c981e206-ed29-45b6-acfe-558e1d359fae" xlink:href="avnw-20200703.xsd#avnw_MarketBasedStockUnitsMSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f8c9d66d-98ba-4c3d-acdb-7fbd8240f3d8" xlink:to="loc_avnw_MarketBasedStockUnitsMSUMember_c981e206-ed29-45b6-acfe-558e1d359fae" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityPerformanceShareActivityDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#StockholdersEquityPerformanceShareActivityDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityPerformanceShareActivityDetails" xlink:type="extended" id="i0860f118c0ac47d5abfd9133ec4577d6_StockholdersEquityPerformanceShareActivityDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ad49305-fdd0-4348-a457-0444531c4e27" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a828f1a0-69bf-43b2-979b-5a42641fd9a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ad49305-fdd0-4348-a457-0444531c4e27" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a828f1a0-69bf-43b2-979b-5a42641fd9a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_46edfe17-67c5-4bef-a801-3fd6dd54da97" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a828f1a0-69bf-43b2-979b-5a42641fd9a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_46edfe17-67c5-4bef-a801-3fd6dd54da97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_74bb8d98-0e4f-4390-b82c-24f20fb92cb7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a828f1a0-69bf-43b2-979b-5a42641fd9a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_74bb8d98-0e4f-4390-b82c-24f20fb92cb7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_a2bd9816-9844-44cc-b2e7-e1dee9e801df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a828f1a0-69bf-43b2-979b-5a42641fd9a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_a2bd9816-9844-44cc-b2e7-e1dee9e801df" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_f27aeda2-0461-4b1d-bcbe-94b7ce2567ea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_a828f1a0-69bf-43b2-979b-5a42641fd9a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_f27aeda2-0461-4b1d-bcbe-94b7ce2567ea" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_bdd16dfe-97c0-49b9-8514-7c8c8c466b46" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_9bea1cee-ab7f-432b-88ae-63b9f88f38b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ad49305-fdd0-4348-a457-0444531c4e27" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_9bea1cee-ab7f-432b-88ae-63b9f88f38b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_71a18db2-d491-4b9f-a1ea-03bda6628c52" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_9bea1cee-ab7f-432b-88ae-63b9f88f38b9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_71a18db2-d491-4b9f-a1ea-03bda6628c52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d4acca29-8495-4325-b2ec-6d9ef353a7cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_9bea1cee-ab7f-432b-88ae-63b9f88f38b9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d4acca29-8495-4325-b2ec-6d9ef353a7cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5576bcbb-319d-457b-ac4b-6dc7cc3e8493" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_9bea1cee-ab7f-432b-88ae-63b9f88f38b9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5576bcbb-319d-457b-ac4b-6dc7cc3e8493" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_5dce9a2d-91cd-4ab9-86a6-39bbc55b813b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_9bea1cee-ab7f-432b-88ae-63b9f88f38b9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_5dce9a2d-91cd-4ab9-86a6-39bbc55b813b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_b590b046-e889-4902-9a19-edd16adffe5b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_248fdec2-2a38-4703-8e8a-eb9624135b4d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ad49305-fdd0-4348-a457-0444531c4e27" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_248fdec2-2a38-4703-8e8a-eb9624135b4d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_03de6080-7695-4443-b729-498d5d5bbe10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_248fdec2-2a38-4703-8e8a-eb9624135b4d" xlink:to="loc_us-gaap_AwardTypeAxis_03de6080-7695-4443-b729-498d5d5bbe10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_03de6080-7695-4443-b729-498d5d5bbe10_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_03de6080-7695-4443-b729-498d5d5bbe10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_03de6080-7695-4443-b729-498d5d5bbe10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e0093ae-bce0-4a48-8754-9842feed0feb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_03de6080-7695-4443-b729-498d5d5bbe10" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e0093ae-bce0-4a48-8754-9842feed0feb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_b11e90a6-6dd1-4bea-ab6c-69bf6b809488" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e0093ae-bce0-4a48-8754-9842feed0feb" xlink:to="loc_us-gaap_PerformanceSharesMember_b11e90a6-6dd1-4bea-ab6c-69bf6b809488" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformation" xlink:type="simple" xlink:href="avnw-20200703.xsd#SegmentandGeographicInformation"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformation" xlink:type="extended" id="i4b45e2e8cf7e4d5881241092cd715020_SegmentandGeographicInformation"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#SegmentandGeographicInformationTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationTables" xlink:type="extended" id="ibf5d638464064cfb900a30bb72316cef_SegmentandGeographicInformationTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationScheduleofRevenuesbyGeographicRegionDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#SegmentandGeographicInformationScheduleofRevenuesbyGeographicRegionDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationScheduleofRevenuesbyGeographicRegionDetails" xlink:type="extended" id="i9f4ba5d90e6c4a81884f6b8e6d4cecd1_SegmentandGeographicInformationScheduleofRevenuesbyGeographicRegionDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_69915c3d-59f6-4973-acd9-1cd076da9d6b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_3af6124a-ad78-4e54-99e2-684a2e626e72" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_69915c3d-59f6-4973-acd9-1cd076da9d6b" xlink:to="loc_us-gaap_NumberOfReportableSegments_3af6124a-ad78-4e54-99e2-684a2e626e72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_18b9c5fa-8e8d-4206-8e96-0150bafb8e8a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_69915c3d-59f6-4973-acd9-1cd076da9d6b" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_18b9c5fa-8e8d-4206-8e96-0150bafb8e8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d4a06eef-6648-479f-a8d2-91c5ca77016c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_69915c3d-59f6-4973-acd9-1cd076da9d6b" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d4a06eef-6648-479f-a8d2-91c5ca77016c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_8fe7c047-74bf-4f71-a3cd-e5eec1506c74" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d4a06eef-6648-479f-a8d2-91c5ca77016c" xlink:to="loc_srt_StatementGeographicalAxis_8fe7c047-74bf-4f71-a3cd-e5eec1506c74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_8fe7c047-74bf-4f71-a3cd-e5eec1506c74_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_8fe7c047-74bf-4f71-a3cd-e5eec1506c74" xlink:to="loc_srt_SegmentGeographicalDomain_8fe7c047-74bf-4f71-a3cd-e5eec1506c74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ec308437-dc03-41ae-aa55-d786f5148c80" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_8fe7c047-74bf-4f71-a3cd-e5eec1506c74" xlink:to="loc_srt_SegmentGeographicalDomain_ec308437-dc03-41ae-aa55-d786f5148c80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NorthAmericaMember_ea2e1a42-624e-46fb-9540-e5f2a08e3152" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_NorthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ec308437-dc03-41ae-aa55-d786f5148c80" xlink:to="loc_srt_NorthAmericaMember_ea2e1a42-624e-46fb-9540-e5f2a08e3152" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_AfricaAndMiddleEastMember_f22e96f1-7fd6-45f0-930d-644e71d5bacd" xlink:href="avnw-20200703.xsd#avnw_AfricaAndMiddleEastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ec308437-dc03-41ae-aa55-d786f5148c80" xlink:to="loc_avnw_AfricaAndMiddleEastMember_f22e96f1-7fd6-45f0-930d-644e71d5bacd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_EuropeAndRussiaMember_ba6b4995-eaac-48c8-bd45-0974c8aa16f4" xlink:href="avnw-20200703.xsd#avnw_EuropeAndRussiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ec308437-dc03-41ae-aa55-d786f5148c80" xlink:to="loc_avnw_EuropeAndRussiaMember_ba6b4995-eaac-48c8-bd45-0974c8aa16f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_LatinAmericaAndAsiaPacificMember_b8c3717f-3800-427b-b552-57f607f6f1a2" xlink:href="avnw-20200703.xsd#avnw_LatinAmericaAndAsiaPacificMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_ec308437-dc03-41ae-aa55-d786f5148c80" xlink:to="loc_avnw_LatinAmericaAndAsiaPacificMember_b8c3717f-3800-427b-b552-57f607f6f1a2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationRevenuebyCountryDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#SegmentandGeographicInformationRevenuebyCountryDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationRevenuebyCountryDetails" xlink:type="extended" id="i041297197dfd4411b85f8fc78c40d4de_SegmentandGeographicInformationRevenuebyCountryDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_b0b6926c-d1e4-4efe-8f51-a2fab56a3e8b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_717e1ae2-b883-4298-9016-5f5e7bd1d9f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_b0b6926c-d1e4-4efe-8f51-a2fab56a3e8b" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_717e1ae2-b883-4298-9016-5f5e7bd1d9f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_258b8ba6-3575-4868-b64b-443b9232eded" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_b0b6926c-d1e4-4efe-8f51-a2fab56a3e8b" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_258b8ba6-3575-4868-b64b-443b9232eded" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7b24d399-d4cc-49a0-9f77-e74a7e424cea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_b0b6926c-d1e4-4efe-8f51-a2fab56a3e8b" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7b24d399-d4cc-49a0-9f77-e74a7e424cea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_76c32437-ae2f-448a-97c3-8ef1f0f5fed1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7b24d399-d4cc-49a0-9f77-e74a7e424cea" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_76c32437-ae2f-448a-97c3-8ef1f0f5fed1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_76c32437-ae2f-448a-97c3-8ef1f0f5fed1_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_76c32437-ae2f-448a-97c3-8ef1f0f5fed1" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_76c32437-ae2f-448a-97c3-8ef1f0f5fed1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_68079d0f-dde6-401f-9d5e-20c758980f2a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_76c32437-ae2f-448a-97c3-8ef1f0f5fed1" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_68079d0f-dde6-401f-9d5e-20c758980f2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_71c52a03-7fb6-4a69-b658-19b090dd225d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_68079d0f-dde6-401f-9d5e-20c758980f2a" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_71c52a03-7fb6-4a69-b658-19b090dd225d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_99666241-5a2b-4c71-b1d0-7da3ec9bd69a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7b24d399-d4cc-49a0-9f77-e74a7e424cea" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_99666241-5a2b-4c71-b1d0-7da3ec9bd69a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_99666241-5a2b-4c71-b1d0-7da3ec9bd69a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_99666241-5a2b-4c71-b1d0-7da3ec9bd69a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_99666241-5a2b-4c71-b1d0-7da3ec9bd69a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_ced530dd-31a5-4f6e-97ac-d5890c664c7c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_99666241-5a2b-4c71-b1d0-7da3ec9bd69a" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_ced530dd-31a5-4f6e-97ac-d5890c664c7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_cbc947df-472d-4f21-8cba-267f69410216" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_ced530dd-31a5-4f6e-97ac-d5890c664c7c" xlink:to="loc_us-gaap_SalesRevenueNetMember_cbc947df-472d-4f21-8cba-267f69410216" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_3acac011-b09a-4c86-ad4d-c65eda165c20" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7b24d399-d4cc-49a0-9f77-e74a7e424cea" xlink:to="loc_srt_StatementGeographicalAxis_3acac011-b09a-4c86-ad4d-c65eda165c20" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_3acac011-b09a-4c86-ad4d-c65eda165c20_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_3acac011-b09a-4c86-ad4d-c65eda165c20" xlink:to="loc_srt_SegmentGeographicalDomain_3acac011-b09a-4c86-ad4d-c65eda165c20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_1b9d586b-e65f-4cce-8f88-15d0ec2fbe92" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_3acac011-b09a-4c86-ad4d-c65eda165c20" xlink:to="loc_srt_SegmentGeographicalDomain_1b9d586b-e65f-4cce-8f88-15d0ec2fbe92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_15354536-784f-439b-b6ee-6f5297a36e02" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1b9d586b-e65f-4cce-8f88-15d0ec2fbe92" xlink:to="loc_country_US_15354536-784f-439b-b6ee-6f5297a36e02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_ZA_a7198ba8-c8c1-40fb-affe-ceb4f9d1cbd1" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_ZA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1b9d586b-e65f-4cce-8f88-15d0ec2fbe92" xlink:to="loc_country_ZA_a7198ba8-c8c1-40fb-affe-ceb4f9d1cbd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_PH_07a13c34-48b9-4242-bb79-3b79e9485095" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_PH"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1b9d586b-e65f-4cce-8f88-15d0ec2fbe92" xlink:to="loc_country_PH_07a13c34-48b9-4242-bb79-3b79e9485095" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationLongLivedAssetsbyCountryDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#SegmentandGeographicInformationLongLivedAssetsbyCountryDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationLongLivedAssetsbyCountryDetails" xlink:type="extended" id="idb688d57f4a94b8a9a287f8e028f7fa0_SegmentandGeographicInformationLongLivedAssetsbyCountryDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_0081e4f3-64cd-413d-b418-61b11c137b16" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_c854c636-a9f6-4861-91be-0e86050d8dc1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_0081e4f3-64cd-413d-b418-61b11c137b16" xlink:to="loc_us-gaap_NoncurrentAssets_c854c636-a9f6-4861-91be-0e86050d8dc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7ba8979c-da6f-48bc-9c9c-7f0a426a3f70" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_0081e4f3-64cd-413d-b418-61b11c137b16" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7ba8979c-da6f-48bc-9c9c-7f0a426a3f70" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_2e8ce976-e142-489e-b262-a3a3f199e514" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_7ba8979c-da6f-48bc-9c9c-7f0a426a3f70" xlink:to="loc_srt_StatementGeographicalAxis_2e8ce976-e142-489e-b262-a3a3f199e514" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_2e8ce976-e142-489e-b262-a3a3f199e514_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_2e8ce976-e142-489e-b262-a3a3f199e514" xlink:to="loc_srt_SegmentGeographicalDomain_2e8ce976-e142-489e-b262-a3a3f199e514_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_b3c9160d-1939-48ca-ba37-dc2b3e8c4eeb" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_2e8ce976-e142-489e-b262-a3a3f199e514" xlink:to="loc_srt_SegmentGeographicalDomain_b3c9160d-1939-48ca-ba37-dc2b3e8c4eeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_NZ_64429cf3-5eb5-407d-b302-38c9fa047cdc" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_NZ"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_b3c9160d-1939-48ca-ba37-dc2b3e8c4eeb" xlink:to="loc_country_NZ_64429cf3-5eb5-407d-b302-38c9fa047cdc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_f43bb59c-c9a1-4a9e-a4f3-76f339db6bf7" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_b3c9160d-1939-48ca-ba37-dc2b3e8c4eeb" xlink:to="loc_country_US_f43bb59c-c9a1-4a9e-a4f3-76f339db6bf7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_GB_e592aca0-204a-4660-98bf-ab3436ed8087" xlink:href="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd#country_GB"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_b3c9160d-1939-48ca-ba37-dc2b3e8c4eeb" xlink:to="loc_country_GB_e592aca0-204a-4660-98bf-ab3436ed8087" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_OtherCountriesMember_9688771c-1994-4767-bda6-7f12430b6d6b" xlink:href="avnw-20200703.xsd#avnw_OtherCountriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_b3c9160d-1939-48ca-ba37-dc2b3e8c4eeb" xlink:to="loc_avnw_OtherCountriesMember_9688771c-1994-4767-bda6-7f12430b6d6b" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxes" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxes"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxes" xlink:type="extended" id="icbdd93d8b04b4943b576d70c61fdfb77_IncomeTaxes"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxesTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesTables" xlink:type="extended" id="i09b0a12053cf45c880b32e80d24829de_IncomeTaxesTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesIncomebeforeProvisionforIncomeTaxesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxesIncomebeforeProvisionforIncomeTaxesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesIncomebeforeProvisionforIncomeTaxesDetails" xlink:type="extended" id="ia703a8992c7b47adb98f74a88ffe908d_IncomeTaxesIncomebeforeProvisionforIncomeTaxesDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxesComponentsofIncomeTaxExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails" xlink:type="extended" id="ic7da98e9fd804e6a85e6bb9ddd3b2081_IncomeTaxesComponentsofIncomeTaxExpenseDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesEffectiveIncomeRateReconciliationDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxesEffectiveIncomeRateReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesEffectiveIncomeRateReconciliationDetails" xlink:type="extended" id="ieddbb25a834f4d94922f714b314cdf9a_IncomeTaxesEffectiveIncomeRateReconciliationDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesNarrativeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" id="ia1c3e256109f45678bfa8be6793d783f_IncomeTaxesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExaminationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_3544f023-664a-4dfb-bc32-465607a20718" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_3544f023-664a-4dfb-bc32-465607a20718" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_29493df4-c775-490b-8dc9-693b3af9ef0b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_29493df4-c775-490b-8dc9-693b3af9ef0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_EffectiveIncomeTaxRateReconciliationTaxCreditAndDeductionsGeneratedAndExpiredAmount_e7c4091e-a9f6-4695-885f-0a5c1874a0a7" xlink:href="avnw-20200703.xsd#avnw_EffectiveIncomeTaxRateReconciliationTaxCreditAndDeductionsGeneratedAndExpiredAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_avnw_EffectiveIncomeTaxRateReconciliationTaxCreditAndDeductionsGeneratedAndExpiredAmount_e7c4091e-a9f6-4695-885f-0a5c1874a0a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_EffectiveIncomeTaxRateReconciliationDeferredTrueUpAdjustmentsAmount_acc17512-1102-49cb-bf45-4d816667d164" xlink:href="avnw-20200703.xsd#avnw_EffectiveIncomeTaxRateReconciliationDeferredTrueUpAdjustmentsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_avnw_EffectiveIncomeTaxRateReconciliationDeferredTrueUpAdjustmentsAmount_acc17512-1102-49cb-bf45-4d816667d164" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_a9e89188-3239-448f-b8fe-f0dc88c60ac2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_a9e89188-3239-448f-b8fe-f0dc88c60ac2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ReleaseOfValuationAllowanceFederalAndStateIncomeTaxExpenseBenefit_fdb869e0-cb8c-4442-951c-96ab3300b868" xlink:href="avnw-20200703.xsd#avnw_ReleaseOfValuationAllowanceFederalAndStateIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_avnw_ReleaseOfValuationAllowanceFederalAndStateIncomeTaxExpenseBenefit_fdb869e0-cb8c-4442-951c-96ab3300b868" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_51a62ea7-e96a-468e-8b39-4c66600d3582" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_51a62ea7-e96a-468e-8b39-4c66600d3582" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ReleaseofValuationAllowanceForeignTaxCreditIncomeTaxExpenseBenefit_46b9483c-341c-4b0b-87d3-ab5e3fd1d20b" xlink:href="avnw-20200703.xsd#avnw_ReleaseofValuationAllowanceForeignTaxCreditIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_avnw_ReleaseofValuationAllowanceForeignTaxCreditIncomeTaxExpenseBenefit_46b9483c-341c-4b0b-87d3-ab5e3fd1d20b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_060d6498-d001-4751-b8eb-bc921b1680ec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_060d6498-d001-4751-b8eb-bc921b1680ec" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_a677c626-6062-4514-b05d-fa4d60144b1e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_a677c626-6062-4514-b05d-fa4d60144b1e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_f1875d15-d1ed-406f-82f4-932c5b36acc1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_f1875d15-d1ed-406f-82f4-932c5b36acc1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_40cecb3e-a0ee-4556-964b-ef308f275603" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_40cecb3e-a0ee-4556-964b-ef308f275603" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_c7631faa-522f-4621-bbda-c0defc896132" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_c7631faa-522f-4621-bbda-c0defc896132" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_f9c2cdd6-17a4-4ef4-b52e-e362e6c3fb1a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_OperatingLossCarryforwards_f9c2cdd6-17a4-4ef4-b52e-e362e6c3fb1a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_9f8a3a3a-6f4c-4182-b696-16f9c51864a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_9f8a3a3a-6f4c-4182-b696-16f9c51864a9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsOfForeignSubsidiaries_af929e22-a5de-41e8-8eed-4c1d1fb028bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UndistributedEarningsOfForeignSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_UndistributedEarningsOfForeignSubsidiaries_af929e22-a5de-41e8-8eed-4c1d1fb028bd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_f24f7b92-5c91-4226-9207-6b5deff0c7e2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_f24f7b92-5c91-4226-9207-6b5deff0c7e2" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_fea30fc7-c9cf-4101-a8af-ec09b284f7ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_fea30fc7-c9cf-4101-a8af-ec09b284f7ac" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_dd7dc5bf-b8f9-47ff-a8bd-db2eb061c324" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_dd7dc5bf-b8f9-47ff-a8bd-db2eb061c324" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_210b94f6-8427-4e6f-ad6b-bdfd314892b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_210b94f6-8427-4e6f-ad6b-bdfd314892b3" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExaminationIncreaseDecreaseInLiabilityFromPriorYear_0b843149-7274-407f-acab-4229dee9035a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExaminationIncreaseDecreaseInLiabilityFromPriorYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_IncomeTaxExaminationIncreaseDecreaseInLiabilityFromPriorYear_0b843149-7274-407f-acab-4229dee9035a" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_IncomeTaxesReceivableAlternativeMinimumTaxCARESAct_82508246-3392-42f8-a485-db11ec5adeff" xlink:href="avnw-20200703.xsd#avnw_IncomeTaxesReceivableAlternativeMinimumTaxCARESAct"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_avnw_IncomeTaxesReceivableAlternativeMinimumTaxCARESAct_82508246-3392-42f8-a485-db11ec5adeff" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExaminationTable_d1fe49fd-e99a-4492-b6ca-31bf0afd3dfb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExaminationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_02bbb02e-cfbd-43ae-a8e5-695ba148aa87" xlink:to="loc_us-gaap_IncomeTaxExaminationTable_d1fe49fd-e99a-4492-b6ca-31bf0afd3dfb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_383612c9-4223-4799-a87e-c9699584103d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxExaminationTable_d1fe49fd-e99a-4492-b6ca-31bf0afd3dfb" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_383612c9-4223-4799-a87e-c9699584103d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_383612c9-4223-4799-a87e-c9699584103d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_383612c9-4223-4799-a87e-c9699584103d" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_383612c9-4223-4799-a87e-c9699584103d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_299fcfd3-040b-43db-a96c-0f88e9691b69" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_383612c9-4223-4799-a87e-c9699584103d" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_299fcfd3-040b-43db-a96c-0f88e9691b69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_c70265d3-5c8f-46a8-b16d-eb2423013218" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_299fcfd3-040b-43db-a96c-0f88e9691b69" xlink:to="loc_us-gaap_DomesticCountryMember_c70265d3-5c8f-46a8-b16d-eb2423013218" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_eb9927d0-0b29-4856-85ab-4ee443eabe4a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_299fcfd3-040b-43db-a96c-0f88e9691b69" xlink:to="loc_us-gaap_ForeignCountryMember_eb9927d0-0b29-4856-85ab-4ee443eabe4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_6d0e02e7-f856-460a-8c3a-ac46fc49dbd7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxExaminationTable_d1fe49fd-e99a-4492-b6ca-31bf0afd3dfb" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_6d0e02e7-f856-460a-8c3a-ac46fc49dbd7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_6d0e02e7-f856-460a-8c3a-ac46fc49dbd7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_6d0e02e7-f856-460a-8c3a-ac46fc49dbd7" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_6d0e02e7-f856-460a-8c3a-ac46fc49dbd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_75668529-908e-4dbe-945e-46de107b92c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_6d0e02e7-f856-460a-8c3a-ac46fc49dbd7" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_75668529-908e-4dbe-945e-46de107b92c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecretariatOfTheFederalRevenueBureauOfBrazilMember_108ee82f-6989-4ebe-8d88-dbe3e52f209b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecretariatOfTheFederalRevenueBureauOfBrazilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_75668529-908e-4dbe-945e-46de107b92c6" xlink:to="loc_us-gaap_SecretariatOfTheFederalRevenueBureauOfBrazilMember_108ee82f-6989-4ebe-8d88-dbe3e52f209b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InlandRevenueSingaporeIRASMember_da558b50-185d-430a-afa4-4f9fedc45e34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InlandRevenueSingaporeIRASMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_75668529-908e-4dbe-945e-46de107b92c6" xlink:to="loc_us-gaap_InlandRevenueSingaporeIRASMember_da558b50-185d-430a-afa4-4f9fedc45e34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_53b532b8-96cf-494c-9c54-2642bc52608d" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxExaminationTable_d1fe49fd-e99a-4492-b6ca-31bf0afd3dfb" xlink:to="loc_dei_LegalEntityAxis_53b532b8-96cf-494c-9c54-2642bc52608d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_53b532b8-96cf-494c-9c54-2642bc52608d_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_53b532b8-96cf-494c-9c54-2642bc52608d" xlink:to="loc_dei_EntityDomain_53b532b8-96cf-494c-9c54-2642bc52608d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_bfabea05-8c6e-4072-b191-5c42176adc03" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_53b532b8-96cf-494c-9c54-2642bc52608d" xlink:to="loc_dei_EntityDomain_bfabea05-8c6e-4072-b191-5c42176adc03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_AviatNetworksInc.Member_bcce920c-11d3-497b-94eb-e8b35230160a" xlink:href="avnw-20200703.xsd#avnw_AviatNetworksInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_bfabea05-8c6e-4072-b191-5c42176adc03" xlink:to="loc_avnw_AviatNetworksInc.Member_bcce920c-11d3-497b-94eb-e8b35230160a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_L3HarrisTechnologiesInc.Member_dd8806c8-464f-401a-b627-cb3844fb500b" xlink:href="avnw-20200703.xsd#avnw_L3HarrisTechnologiesInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_bfabea05-8c6e-4072-b191-5c42176adc03" xlink:to="loc_avnw_L3HarrisTechnologiesInc.Member_dd8806c8-464f-401a-b627-cb3844fb500b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_db9e1350-08ce-425d-8d8b-bdaff748c04d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxExaminationTable_d1fe49fd-e99a-4492-b6ca-31bf0afd3dfb" xlink:to="loc_srt_RestatementAxis_db9e1350-08ce-425d-8d8b-bdaff748c04d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_db9e1350-08ce-425d-8d8b-bdaff748c04d_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_db9e1350-08ce-425d-8d8b-bdaff748c04d" xlink:to="loc_srt_RestatementDomain_db9e1350-08ce-425d-8d8b-bdaff748c04d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_1cc3660c-eb55-4484-ab5f-786c2c5e1d98" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_db9e1350-08ce-425d-8d8b-bdaff748c04d" xlink:to="loc_srt_RestatementDomain_1cc3660c-eb55-4484-ab5f-786c2c5e1d98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember_af8a0823-8306-4756-bb92-a409a2b1d327" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_1cc3660c-eb55-4484-ab5f-786c2c5e1d98" xlink:to="loc_srt_RevisionOfPriorPeriodErrorCorrectionAdjustmentMember_af8a0823-8306-4756-bb92-a409a2b1d327" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RevisionOfPriorPeriodReclassificationAdjustmentMember_4d63fe4f-5f9b-4987-a893-9e1a76497fd3" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RevisionOfPriorPeriodReclassificationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_1cc3660c-eb55-4484-ab5f-786c2c5e1d98" xlink:to="loc_srt_RevisionOfPriorPeriodReclassificationAdjustmentMember_4d63fe4f-5f9b-4987-a893-9e1a76497fd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_f5cf6da6-5542-41c4-bac7-d283ef33b30d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxExaminationTable_d1fe49fd-e99a-4492-b6ca-31bf0afd3dfb" xlink:to="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_f5cf6da6-5542-41c4-bac7-d283ef33b30d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_f5cf6da6-5542-41c4-bac7-d283ef33b30d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsForErrorCorrectionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_f5cf6da6-5542-41c4-bac7-d283ef33b30d" xlink:to="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_f5cf6da6-5542-41c4-bac7-d283ef33b30d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_6cf5f081-653d-475f-8f83-005592dc283a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsForErrorCorrectionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis_f5cf6da6-5542-41c4-bac7-d283ef33b30d" xlink:to="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_6cf5f081-653d-475f-8f83-005592dc283a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_CorrectionOfPriorYearBalanceOfDeferredTaxAssetsDeferredTaxLiabilitiesAndValuationAllowanceMember_1b4b00b2-500c-4d82-94de-f8dadca151ce" xlink:href="avnw-20200703.xsd#avnw_CorrectionOfPriorYearBalanceOfDeferredTaxAssetsDeferredTaxLiabilitiesAndValuationAllowanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_6cf5f081-653d-475f-8f83-005592dc283a" xlink:to="loc_avnw_CorrectionOfPriorYearBalanceOfDeferredTaxAssetsDeferredTaxLiabilitiesAndValuationAllowanceMember_1b4b00b2-500c-4d82-94de-f8dadca151ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_CorrectionOfPriorYearBalanceOfUnrecognizedTaxBenefitsDeferredTaxAssetAndValuationAllowanceRelatedToCertainReservesMember_5aec921c-5c0d-4378-9640-897673f0954f" xlink:href="avnw-20200703.xsd#avnw_CorrectionOfPriorYearBalanceOfUnrecognizedTaxBenefitsDeferredTaxAssetAndValuationAllowanceRelatedToCertainReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsForErrorCorrectionDomain_6cf5f081-653d-475f-8f83-005592dc283a" xlink:to="loc_avnw_CorrectionOfPriorYearBalanceOfUnrecognizedTaxBenefitsDeferredTaxAssetAndValuationAllowanceRelatedToCertainReservesMember_5aec921c-5c0d-4378-9640-897673f0954f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended" id="i5de534bd50774e4db80c803c6eae407f_IncomeTaxesComponentsofDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesUnrecognizedTaxBenefitActivityDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#IncomeTaxesUnrecognizedTaxBenefitActivityDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesUnrecognizedTaxBenefitActivityDetails" xlink:type="extended" id="ica930bcbcabd42ba937fe2a82793f28d_IncomeTaxesUnrecognizedTaxBenefitActivityDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="avnw-20200703.xsd#CommitmentsandContingencies"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsandContingencies" xlink:type="extended" id="i03d74566aebc497bad2b67549f65c530_CommitmentsandContingencies"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#CommitmentsandContingenciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="extended" id="i501458bb6c3b4c72be862d128ea3cd0c_CommitmentsandContingenciesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_09bba0fb-7549-459e-9cd3-5c00d12c3643" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentAmount_2daafd66-be79-4c88-afa2-9afccb391ede" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermPurchaseCommitmentAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_09bba0fb-7549-459e-9cd3-5c00d12c3643" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentAmount_2daafd66-be79-4c88-afa2-9afccb391ede" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_c53cce79-049a-40d5-a4dc-a76e074d671f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_09bba0fb-7549-459e-9cd3-5c00d12c3643" xlink:to="loc_us-gaap_OtherCommitment_c53cce79-049a-40d5-a4dc-a76e074d671f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_TermofFinancialGuarantees_149f9c42-4cd0-4df5-a59f-e6a8431f89ef" xlink:href="avnw-20200703.xsd#avnw_TermofFinancialGuarantees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_09bba0fb-7549-459e-9cd3-5c00d12c3643" xlink:to="loc_avnw_TermofFinancialGuarantees_149f9c42-4cd0-4df5-a59f-e6a8431f89ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_a3865a40-cbf1-4e32-b35e-9d425c57e8a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_09bba0fb-7549-459e-9cd3-5c00d12c3643" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_a3865a40-cbf1-4e32-b35e-9d425c57e8a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_PaymentforPerformanceGuarantee_5df7068a-8b83-4016-8dd5-2a07e8dd854b" xlink:href="avnw-20200703.xsd#avnw_PaymentforPerformanceGuarantee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_09bba0fb-7549-459e-9cd3-5c00d12c3643" xlink:to="loc_avnw_PaymentforPerformanceGuarantee_5df7068a-8b83-4016-8dd5-2a07e8dd854b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_d2d7b6dc-a634-4d34-b59c-94dbde6214a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_09bba0fb-7549-459e-9cd3-5c00d12c3643" xlink:to="loc_us-gaap_OtherCommitmentsTable_d2d7b6dc-a634-4d34-b59c-94dbde6214a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_4706d4e1-5fbd-4937-8f09-26127ad40a89" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_d2d7b6dc-a634-4d34-b59c-94dbde6214a5" xlink:to="loc_srt_RangeAxis_4706d4e1-5fbd-4937-8f09-26127ad40a89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_4706d4e1-5fbd-4937-8f09-26127ad40a89_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_4706d4e1-5fbd-4937-8f09-26127ad40a89" xlink:to="loc_srt_RangeMember_4706d4e1-5fbd-4937-8f09-26127ad40a89_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e56a43e5-1b97-4415-b65b-2ccce0cda344" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_4706d4e1-5fbd-4937-8f09-26127ad40a89" xlink:to="loc_srt_RangeMember_e56a43e5-1b97-4415-b65b-2ccce0cda344" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ddcb370e-da52-4b4f-ad6a-22b59bf59e26" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_e56a43e5-1b97-4415-b65b-2ccce0cda344" xlink:to="loc_srt_MaximumMember_ddcb370e-da52-4b4f-ad6a-22b59bf59e26" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnaudited" xlink:type="simple" xlink:href="avnw-20200703.xsd#QuarterlyFinancialDataUnaudited"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnaudited" xlink:type="extended" id="i7feacba74e3246a48d21ff672186dd44_QuarterlyFinancialDataUnaudited"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnauditedTables" xlink:type="simple" xlink:href="avnw-20200703.xsd#QuarterlyFinancialDataUnauditedTables"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnauditedTables" xlink:type="extended" id="ice645457f571423eb7692d07a041ec4e_QuarterlyFinancialDataUnauditedTables"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnauditedSummarizedQuarterlyDataDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#QuarterlyFinancialDataUnauditedSummarizedQuarterlyDataDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnauditedSummarizedQuarterlyDataDetails" xlink:type="extended" id="i34b67a154c6345c9aa4a098a9061e77d_QuarterlyFinancialDataUnauditedSummarizedQuarterlyDataDetails"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnauditedCertainNonrecurringItemsonIncomeStatementsDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#QuarterlyFinancialDataUnauditedCertainNonrecurringItemsonIncomeStatementsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/QuarterlyFinancialDataUnauditedCertainNonrecurringItemsonIncomeStatementsDetails" xlink:type="extended" id="ia46b4d1aa8104321aacbc08dff4cff53_QuarterlyFinancialDataUnauditedCertainNonrecurringItemsonIncomeStatementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_3efb97c4-f627-4f35-8ef0-b68026734962" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_c883f30e-6a51-437d-b839-e6e1540e5895" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3efb97c4-f627-4f35-8ef0-b68026734962" xlink:to="loc_us-gaap_RestructuringCharges_c883f30e-6a51-437d-b839-e6e1540e5895" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_2c5a106b-8529-47b3-a33d-d56701e8a518" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InventoryWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3efb97c4-f627-4f35-8ef0-b68026734962" xlink:to="loc_us-gaap_InventoryWriteDown_2c5a106b-8529-47b3-a33d-d56701e8a518" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_PaymentforPerformanceGuarantee_3a8e92f9-ac22-49fa-8e7a-d762af594070" xlink:href="avnw-20200703.xsd#avnw_PaymentforPerformanceGuarantee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3efb97c4-f627-4f35-8ef0-b68026734962" xlink:to="loc_avnw_PaymentforPerformanceGuarantee_3a8e92f9-ac22-49fa-8e7a-d762af594070" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxesReceivable_46f51206-268e-4810-ae8e-8270df4ed915" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3efb97c4-f627-4f35-8ef0-b68026734962" xlink:to="loc_us-gaap_IncreaseDecreaseInIncomeTaxesReceivable_46f51206-268e-4810-ae8e-8270df4ed915" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ReleaseOfValuationAllowanceFederalAndStateIncomeTaxExpenseBenefit_35538345-1823-4d89-8327-54ac71a54325" xlink:href="avnw-20200703.xsd#avnw_ReleaseOfValuationAllowanceFederalAndStateIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_3efb97c4-f627-4f35-8ef0-b68026734962" xlink:to="loc_avnw_ReleaseOfValuationAllowanceFederalAndStateIncomeTaxExpenseBenefit_35538345-1823-4d89-8327-54ac71a54325" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_2027e20b-edcc-4c81-bd2e-eece9bd80f79" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_3efb97c4-f627-4f35-8ef0-b68026734962" xlink:to="loc_us-gaap_StatementTable_2027e20b-edcc-4c81-bd2e-eece9bd80f79" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_08a6ac1b-c94b-42d9-ac8c-3874dada8524" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2027e20b-edcc-4c81-bd2e-eece9bd80f79" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_08a6ac1b-c94b-42d9-ac8c-3874dada8524" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_08a6ac1b-c94b-42d9-ac8c-3874dada8524_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_08a6ac1b-c94b-42d9-ac8c-3874dada8524" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_08a6ac1b-c94b-42d9-ac8c-3874dada8524_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_2376ac08-16db-4f84-bb2e-e65eae6152c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_08a6ac1b-c94b-42d9-ac8c-3874dada8524" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_2376ac08-16db-4f84-bb2e-e65eae6152c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecretariatOfTheFederalRevenueBureauOfBrazilMember_abe50cc9-e96d-499d-9a4f-9a8a5652d196" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecretariatOfTheFederalRevenueBureauOfBrazilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_2376ac08-16db-4f84-bb2e-e65eae6152c5" xlink:to="loc_us-gaap_SecretariatOfTheFederalRevenueBureauOfBrazilMember_abe50cc9-e96d-499d-9a4f-9a8a5652d196" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_87ebbf65-e045-4850-95b7-f525a9626256" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2027e20b-edcc-4c81-bd2e-eece9bd80f79" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_87ebbf65-e045-4850-95b7-f525a9626256" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_87ebbf65-e045-4850-95b7-f525a9626256_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_87ebbf65-e045-4850-95b7-f525a9626256" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_87ebbf65-e045-4850-95b7-f525a9626256_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_b6c8f37f-3739-4e38-a67f-211e4eb1c45e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_87ebbf65-e045-4850-95b7-f525a9626256" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_b6c8f37f-3739-4e38-a67f-211e4eb1c45e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_c4344b32-313b-46bb-83fd-ed4f516b7502" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_b6c8f37f-3739-4e38-a67f-211e4eb1c45e" xlink:to="loc_us-gaap_ForeignCountryMember_c4344b32-313b-46bb-83fd-ed4f516b7502" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryAxis_ab04f2f7-88f4-4ee6-aed2-2932c584705b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2027e20b-edcc-4c81-bd2e-eece9bd80f79" xlink:to="loc_us-gaap_PublicUtilitiesInventoryAxis_ab04f2f7-88f4-4ee6-aed2-2932c584705b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_ab04f2f7-88f4-4ee6-aed2-2932c584705b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_ab04f2f7-88f4-4ee6-aed2-2932c584705b" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_ab04f2f7-88f4-4ee6-aed2-2932c584705b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_0a105eeb-05cd-463a-a7f2-0c33842709b0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_ab04f2f7-88f4-4ee6-aed2-2932c584705b" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_0a105eeb-05cd-463a-a7f2-0c33842709b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_WTM3300InventoryMember_12c6f36a-a08b-40e4-8a53-12b91232fa27" xlink:href="avnw-20200703.xsd#avnw_WTM3300InventoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_0a105eeb-05cd-463a-a7f2-0c33842709b0" xlink:to="loc_avnw_WTM3300InventoryMember_12c6f36a-a08b-40e4-8a53-12b91232fa27" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ScheduleIIValuationandQualifyingAccountsandReserves" xlink:type="simple" xlink:href="avnw-20200703.xsd#ScheduleIIValuationandQualifyingAccountsandReserves"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ScheduleIIValuationandQualifyingAccountsandReserves" xlink:type="extended" id="id71efbf8927d435288999668637b0f44_ScheduleIIValuationandQualifyingAccountsandReserves"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ScheduleIIValuationandQualifyingAccountsandReservesDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#ScheduleIIValuationandQualifyingAccountsandReservesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ScheduleIIValuationandQualifyingAccountsandReservesDetails" xlink:type="extended" id="i2d01451942f34390a49cb963e4da6f13_ScheduleIIValuationandQualifyingAccountsandReservesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_b383deec-ef51-42e1-887e-e269d1704dd5" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_2a0ea980-a4d8-4f8a-a538-476484a546e7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_b383deec-ef51-42e1-887e-e269d1704dd5" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_2a0ea980-a4d8-4f8a-a538-476484a546e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_e3bf7a35-c925-4fbd-a1fa-d4ab1cc22b5a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_2a0ea980-a4d8-4f8a-a538-476484a546e7" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_e3bf7a35-c925-4fbd-a1fa-d4ab1cc22b5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_2dafc27d-039a-46e8-8252-3e11a567c927" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_2a0ea980-a4d8-4f8a-a538-476484a546e7" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_2dafc27d-039a-46e8-8252-3e11a567c927" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_331b001d-201b-49b4-8185-b074609503d6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_2a0ea980-a4d8-4f8a-a538-476484a546e7" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_331b001d-201b-49b4-8185-b074609503d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_126a850d-83c0-45b8-a5bd-45bb3b5cfd92" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_49e80dc9-62d5-4f6c-986a-c0e42d1bb617" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_b383deec-ef51-42e1-887e-e269d1704dd5" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_49e80dc9-62d5-4f6c-986a-c0e42d1bb617" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_3e5fbceb-684b-40a6-97af-211576532c03" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_49e80dc9-62d5-4f6c-986a-c0e42d1bb617" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_3e5fbceb-684b-40a6-97af-211576532c03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_3e5fbceb-684b-40a6-97af-211576532c03_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_3e5fbceb-684b-40a6-97af-211576532c03" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_3e5fbceb-684b-40a6-97af-211576532c03_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_36020a3f-8a09-4b61-bb3a-4190cdfba111" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_3e5fbceb-684b-40a6-97af-211576532c03" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_36020a3f-8a09-4b61-bb3a-4190cdfba111" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForCreditLossMember_1349b3b3-6127-4e66-bcac-6e0951b1cb93" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForCreditLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_36020a3f-8a09-4b61-bb3a-4190cdfba111" xlink:to="loc_us-gaap_AllowanceForCreditLossMember_1349b3b3-6127-4e66-bcac-6e0951b1cb93" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/ScheduleIIValuationandQualifyingAccountsandReservesNarrativeDetails" xlink:type="simple" xlink:href="avnw-20200703.xsd#ScheduleIIValuationandQualifyingAccountsandReservesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/ScheduleIIValuationandQualifyingAccountsandReservesNarrativeDetails" xlink:type="extended" id="i40fe02ad4d5c4b598708febffd3d9740_ScheduleIIValuationandQualifyingAccountsandReservesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6d0188e9-7500-43c7-be6a-adfc6846319a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_AllowanceforDoubtfulAccountsReceivableForeignCurrencyTranslationGainLoss_d6d628f7-27b1-46d1-8cd7-cb67d490695b" xlink:href="avnw-20200703.xsd#avnw_AllowanceforDoubtfulAccountsReceivableForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6d0188e9-7500-43c7-be6a-adfc6846319a" xlink:to="loc_avnw_AllowanceforDoubtfulAccountsReceivableForeignCurrencyTranslationGainLoss_d6d628f7-27b1-46d1-8cd7-cb67d490695b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_0b90e300-3aaf-4d99-8591-2ed3005fc661" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6d0188e9-7500-43c7-be6a-adfc6846319a" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_0b90e300-3aaf-4d99-8591-2ed3005fc661" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_b9bb80f8-6a08-4749-a96c-443d61061a45" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6d0188e9-7500-43c7-be6a-adfc6846319a" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_b9bb80f8-6a08-4749-a96c-443d61061a45" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_0ea79578-c5da-416c-b2ca-33f83d30830e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_b9bb80f8-6a08-4749-a96c-443d61061a45" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_0ea79578-c5da-416c-b2ca-33f83d30830e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_0ea79578-c5da-416c-b2ca-33f83d30830e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_0ea79578-c5da-416c-b2ca-33f83d30830e" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_0ea79578-c5da-416c-b2ca-33f83d30830e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_b2c02ab4-1d1c-4475-97c2-699786662fb6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_0ea79578-c5da-416c-b2ca-33f83d30830e" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_b2c02ab4-1d1c-4475-97c2-699786662fb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForCreditLossMember_e3784a95-0faa-4af2-b942-7ba3abd0cbe0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForCreditLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_b2c02ab4-1d1c-4475-97c2-699786662fb6" xlink:to="loc_us-gaap_AllowanceForCreditLossMember_e3784a95-0faa-4af2-b942-7ba3abd0cbe0" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
