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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:e93b8998-f452-451e-8986-d8aa25b49bef,g:7c2f96e3-d996-498a-943f-feac9c910372-->
<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/Cover" xlink:type="simple" xlink:href="avnw-20250328.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_02176ae4-6a0b-4bc8-9776-452f1020c06b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_DocumentInformationTable_02176ae4-6a0b-4bc8-9776-452f1020c06b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_c2868205-9f23-4e9a-9e77-762e292bdd0f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_02176ae4-6a0b-4bc8-9776-452f1020c06b" xlink:to="loc_us-gaap_StatementClassOfStockAxis_c2868205-9f23-4e9a-9e77-762e292bdd0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_c2868205-9f23-4e9a-9e77-762e292bdd0f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c2868205-9f23-4e9a-9e77-762e292bdd0f" xlink:to="loc_us-gaap_ClassOfStockDomain_c2868205-9f23-4e9a-9e77-762e292bdd0f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_42232ccd-8560-44b9-9a6b-63afec183883" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c2868205-9f23-4e9a-9e77-762e292bdd0f" xlink:to="loc_us-gaap_ClassOfStockDomain_42232ccd-8560-44b9-9a6b-63afec183883" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_f7196bc8-9a52-48e8-b8fe-e3d06a6ff734" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_42232ccd-8560-44b9-9a6b-63afec183883" xlink:to="loc_us-gaap_CommonStockMember_f7196bc8-9a52-48e8-b8fe-e3d06a6ff734" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_5a8e587f-1941-4223-bc1e-8c0630198fd9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_42232ccd-8560-44b9-9a6b-63afec183883" xlink:to="loc_us-gaap_PreferredStockMember_5a8e587f-1941-4223-bc1e-8c0630198fd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_9bfbd421-a36c-43c8-8d3f-b98fe714ca28" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_DocumentType_9bfbd421-a36c-43c8-8d3f-b98fe714ca28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_3bf32f33-ac6d-4341-b5e6-15b9c5012d5a" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_DocumentQuarterlyReport_3bf32f33-ac6d-4341-b5e6-15b9c5012d5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_326523d7-7c72-44ca-8ff1-26cd3eca3192" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_DocumentPeriodEndDate_326523d7-7c72-44ca-8ff1-26cd3eca3192" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_d9dc5c23-e8d4-4bf0-a5bd-17e62f326f2e" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_DocumentTransitionReport_d9dc5c23-e8d4-4bf0-a5bd-17e62f326f2e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_c6df7b37-daf2-461f-a67c-c81367bcd0c4" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityFileNumber_c6df7b37-daf2-461f-a67c-c81367bcd0c4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_4639bdbf-8e2c-45af-926e-745c85c0875f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityRegistrantName_4639bdbf-8e2c-45af-926e-745c85c0875f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_74c91018-2a92-4215-86d1-8988a13b1103" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityIncorporationStateCountryCode_74c91018-2a92-4215-86d1-8988a13b1103" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_16259db7-e46c-4585-9f68-01b138a03636" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityTaxIdentificationNumber_16259db7-e46c-4585-9f68-01b138a03636" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_2d0a5b58-2930-4c01-8fc1-a23b805df4b6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityAddressAddressLine1_2d0a5b58-2930-4c01-8fc1-a23b805df4b6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_92d01817-cb38-42a5-a5b7-18ed7c355704" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityAddressCityOrTown_92d01817-cb38-42a5-a5b7-18ed7c355704" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_50e5c5e7-26cd-47d9-ab36-d7108bbea710" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityAddressStateOrProvince_50e5c5e7-26cd-47d9-ab36-d7108bbea710" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_d00bfa7c-01ee-4478-a7c8-0927088d014d" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityAddressPostalZipCode_d00bfa7c-01ee-4478-a7c8-0927088d014d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_1ff15b2d-b529-47ec-8933-02dd57bc79b1" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_CityAreaCode_1ff15b2d-b529-47ec-8933-02dd57bc79b1" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_f529f315-7744-449d-af74-a58a708cb823" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_LocalPhoneNumber_f529f315-7744-449d-af74-a58a708cb823" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_6e28867f-dcc6-403d-8df0-6614cfb7dd6a" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_Security12bTitle_6e28867f-dcc6-403d-8df0-6614cfb7dd6a" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_eb490ad7-fb43-448c-a1d2-6f32af3421c9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_TradingSymbol_eb490ad7-fb43-448c-a1d2-6f32af3421c9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_55aca5b0-6a38-4124-ac22-a33886750853" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_SecurityExchangeName_55aca5b0-6a38-4124-ac22-a33886750853" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_NoTradingSymbolFlag_2639e395-8349-4ab5-be6c-2c0b854a1b40" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_NoTradingSymbolFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_NoTradingSymbolFlag_2639e395-8349-4ab5-be6c-2c0b854a1b40" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_45d47bbc-f9ef-4537-a5e2-dca7cb8d10f7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityCurrentReportingStatus_45d47bbc-f9ef-4537-a5e2-dca7cb8d10f7" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_df39af7e-9489-40cb-8e56-edf93ed6e7c9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityInteractiveDataCurrent_df39af7e-9489-40cb-8e56-edf93ed6e7c9" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_ec84107f-95b9-4c16-bd4c-97892f89dd43" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityFilerCategory_ec84107f-95b9-4c16-bd4c-97892f89dd43" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_da997c69-2ca4-42db-84c7-568216e0b774" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntitySmallBusiness_da997c69-2ca4-42db-84c7-568216e0b774" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_50a02c16-6819-4abf-bb68-87936b7749e1" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityEmergingGrowthCompany_50a02c16-6819-4abf-bb68-87936b7749e1" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_876fb2e7-8755-4485-86e4-286a809d0ebe" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityShellCompany_876fb2e7-8755-4485-86e4-286a809d0ebe" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_38ff2267-63ac-4fc5-b07e-3f9bdd42da07" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_38ff2267-63ac-4fc5-b07e-3f9bdd42da07" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_14cdc87a-cf5e-42a1-87c2-3eb787ad0659" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_EntityCentralIndexKey_14cdc87a-cf5e-42a1-87c2-3eb787ad0659" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_2c832414-3f39-4b2a-84fe-5386d7da1833" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_CurrentFiscalYearEndDate_2c832414-3f39-4b2a-84fe-5386d7da1833" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_2dc30638-dd21-4834-8ccf-794b4ce3a9d0" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_DocumentFiscalYearFocus_2dc30638-dd21-4834-8ccf-794b4ce3a9d0" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_654b97ee-21fd-4b79-ac90-efc89b6df5de" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_DocumentFiscalPeriodFocus_654b97ee-21fd-4b79-ac90-efc89b6df5de" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_404e934a-bb9c-4033-96b9-169cd080adb6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_fa81e77b-2f10-45f5-9350-d4a2e4859255" xlink:to="loc_dei_AmendmentFlag_404e934a-bb9c-4033-96b9-169cd080adb6" xlink:type="arc" order="29"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited" xlink:type="simple" xlink:href="avnw-20250328.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_6dd696b7-1a33-497c-8fad-4e022e84fd85" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_StatementTable_6dd696b7-1a33-497c-8fad-4e022e84fd85" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_39844bec-77cf-44de-8e32-7e2eb32c37c1" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_6dd696b7-1a33-497c-8fad-4e022e84fd85" xlink:to="loc_srt_ProductOrServiceAxis_39844bec-77cf-44de-8e32-7e2eb32c37c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_39844bec-77cf-44de-8e32-7e2eb32c37c1_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_39844bec-77cf-44de-8e32-7e2eb32c37c1" xlink:to="loc_srt_ProductsAndServicesDomain_39844bec-77cf-44de-8e32-7e2eb32c37c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_009d436f-b68d-4b1f-9086-c7ef4357d1f6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_39844bec-77cf-44de-8e32-7e2eb32c37c1" xlink:to="loc_srt_ProductsAndServicesDomain_009d436f-b68d-4b1f-9086-c7ef4357d1f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_99f1ebee-eca9-4453-acd4-037eb054f985" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_009d436f-b68d-4b1f-9086-c7ef4357d1f6" xlink:to="loc_us-gaap_ProductMember_99f1ebee-eca9-4453-acd4-037eb054f985" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_31a205f9-f540-4135-ab24-ad79f7bd5007" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_009d436f-b68d-4b1f-9086-c7ef4357d1f6" xlink:to="loc_us-gaap_ServiceMember_31a205f9-f540-4135-ab24-ad79f7bd5007" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_df313d60-787b-4c67-a039-056b110e73fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_RevenuesAbstract_df313d60-787b-4c67-a039-056b110e73fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_5f8782f1-5124-4166-97e0-68257ea60063" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_df313d60-787b-4c67-a039-056b110e73fe" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_5f8782f1-5124-4166-97e0-68257ea60063" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_03fe147f-40ca-4182-ae8f-53a02267cafa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_03fe147f-40ca-4182-ae8f-53a02267cafa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_a69e4867-0045-4bd1-9035-f92e35e36e2f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_03fe147f-40ca-4182-ae8f-53a02267cafa" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_a69e4867-0045-4bd1-9035-f92e35e36e2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_97720ec9-69b5-4727-9925-949efad2dec2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_GrossProfit_97720ec9-69b5-4727-9925-949efad2dec2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_238c039d-22d2-45a0-b371-aa63866a5e23" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_OperatingExpensesAbstract_238c039d-22d2-45a0-b371-aa63866a5e23" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_936d3792-0046-42e5-af86-d815af0f15cc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_238c039d-22d2-45a0-b371-aa63866a5e23" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_936d3792-0046-42e5-af86-d815af0f15cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_7588d940-6516-4a6f-84ff-47a20d08d7f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_238c039d-22d2-45a0-b371-aa63866a5e23" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_7588d940-6516-4a6f-84ff-47a20d08d7f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_226184d1-976c-4600-acaf-69213ea092f2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_238c039d-22d2-45a0-b371-aa63866a5e23" xlink:to="loc_us-gaap_RestructuringCharges_226184d1-976c-4600-acaf-69213ea092f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_8e7a8423-10b8-475e-bc82-8e1ae7785c55" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_238c039d-22d2-45a0-b371-aa63866a5e23" xlink:to="loc_us-gaap_OperatingExpenses_8e7a8423-10b8-475e-bc82-8e1ae7785c55" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_8e9e56ba-6773-4dae-8d05-c282da51ae6d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_OperatingIncomeLoss_8e9e56ba-6773-4dae-8d05-c282da51ae6d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_44379357-9711-4cac-a955-3b976e9c7d30" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_44379357-9711-4cac-a955-3b976e9c7d30" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_55f05380-13e1-4102-b931-daafc2319f2c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_55f05380-13e1-4102-b931-daafc2319f2c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_855c2ff4-16d7-4ead-84f1-1ad8c5d94677" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_855c2ff4-16d7-4ead-84f1-1ad8c5d94677" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_bb532b0a-9e1b-4271-a0e2-bf507fbbcf7d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_bb532b0a-9e1b-4271-a0e2-bf507fbbcf7d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_eeaffa8c-1579-4b8d-97d1-0f60e469ec57" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_eeaffa8c-1579-4b8d-97d1-0f60e469ec57" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_c7056ff1-4394-4bdd-bee2-9bcbb8a5fa69" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_c7056ff1-4394-4bdd-bee2-9bcbb8a5fa69" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_2ee16a55-615c-497a-8c33-022c7ac16172" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_EarningsPerShareAbstract_2ee16a55-615c-497a-8c33-022c7ac16172" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_582cfd91-44a1-4d3c-acc6-f541ab9516b6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_2ee16a55-615c-497a-8c33-022c7ac16172" xlink:to="loc_us-gaap_EarningsPerShareBasic_582cfd91-44a1-4d3c-acc6-f541ab9516b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_e8370554-e678-4797-92fe-89403964ba16" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_2ee16a55-615c-497a-8c33-022c7ac16172" xlink:to="loc_us-gaap_EarningsPerShareDiluted_e8370554-e678-4797-92fe-89403964ba16" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_c484724f-f46c-4c69-a99d-a2a7a2de6b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6a5a91af-81fe-4566-842d-0c96f825f6d4" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_c484724f-f46c-4c69-a99d-a2a7a2de6b1b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_a2effd08-fc5a-4fe1-bdc4-2b4b9909f0a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_c484724f-f46c-4c69-a99d-a2a7a2de6b1b" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_a2effd08-fc5a-4fe1-bdc4-2b4b9909f0a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_00dd5bf4-601e-4874-a638-631f77501151" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_c484724f-f46c-4c69-a99d-a2a7a2de6b1b" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_00dd5bf4-601e-4874-a638-631f77501151" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnaudited" xlink:type="simple" xlink:href="avnw-20250328.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnaudited"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_5148eb5a-cdd5-4a19-80c1-9994fae1969f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_e0026ec0-16dd-437b-9ede-163b7e2c5610" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_5148eb5a-cdd5-4a19-80c1-9994fae1969f" xlink:to="loc_us-gaap_StatementTable_e0026ec0-16dd-437b-9ede-163b7e2c5610" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_cf94614d-9727-4211-af61-7159b888c9ee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_e0026ec0-16dd-437b-9ede-163b7e2c5610" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_cf94614d-9727-4211-af61-7159b888c9ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_cf94614d-9727-4211-af61-7159b888c9ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_cf94614d-9727-4211-af61-7159b888c9ee" xlink:to="loc_us-gaap_EquityComponentDomain_cf94614d-9727-4211-af61-7159b888c9ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e4a036a7-2607-473e-874b-8dddc4361f21" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_cf94614d-9727-4211-af61-7159b888c9ee" xlink:to="loc_us-gaap_EquityComponentDomain_e4a036a7-2607-473e-874b-8dddc4361f21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_17d75a05-0e16-4b1a-bcb6-23e5a40e2a1c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e4a036a7-2607-473e-874b-8dddc4361f21" xlink:to="loc_us-gaap_CommonStockMember_17d75a05-0e16-4b1a-bcb6-23e5a40e2a1c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_65c25f44-aaf4-4f7d-91bb-278d9331bddd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e4a036a7-2607-473e-874b-8dddc4361f21" xlink:to="loc_us-gaap_TreasuryStockCommonMember_65c25f44-aaf4-4f7d-91bb-278d9331bddd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_2c69f50a-76b1-4129-90cd-7bf809e3fec3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e4a036a7-2607-473e-874b-8dddc4361f21" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_2c69f50a-76b1-4129-90cd-7bf809e3fec3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_77c16d31-a1e2-4c6d-a93e-24e70d478379" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e4a036a7-2607-473e-874b-8dddc4361f21" xlink:to="loc_us-gaap_RetainedEarningsMember_77c16d31-a1e2-4c6d-a93e-24e70d478379" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9386bb3b-0348-4fab-9bac-c886383da926" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e4a036a7-2607-473e-874b-8dddc4361f21" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9386bb3b-0348-4fab-9bac-c886383da926" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_5148eb5a-cdd5-4a19-80c1-9994fae1969f" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_b8c4fdcd-2b09-4f82-9191-e35a4a6db74b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_b8c4fdcd-2b09-4f82-9191-e35a4a6db74b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_8f2710ae-5d03-40a3-a076-5b91819ae12b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_StockholdersEquity_8f2710ae-5d03-40a3-a076-5b91819ae12b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_23c5db38-58db-42f9-a310-da1b0c329e7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_NetIncomeLoss_23c5db38-58db-42f9-a310-da1b0c329e7f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_bc5e22a5-2eca-456f-83e7-2f5e524a2257" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_bc5e22a5-2eca-456f-83e7-2f5e524a2257" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan_1633aa7a-fe16-4813-9d37-34bfb1477c45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan_1633aa7a-fe16-4813-9d37-34bfb1477c45" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_4b85e38b-790e-4c7a-a870-3346b2ba5789" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_4b85e38b-790e-4c7a-a870-3346b2ba5789" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_539c1c8e-ae25-4d31-95f0-0dfbbe7293f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_539c1c8e-ae25-4d31-95f0-0dfbbe7293f9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_705e0cb2-e0f1-4072-bdb1-2a71fd2b7cff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_705e0cb2-e0f1-4072-bdb1-2a71fd2b7cff" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_af780476-e8e0-4153-8802-c903bafb8c45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_af780476-e8e0-4153-8802-c903bafb8c45" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_6138494c-b0bd-4907-a3ec-c63892b9cf6a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_6138494c-b0bd-4907-a3ec-c63892b9cf6a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_84875de8-4862-49ef-92a1-f41c806082f4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_84875de8-4862-49ef-92a1-f41c806082f4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_60fa7b7a-84bd-4d2a-b12c-6b6598a0d08e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_60fa7b7a-84bd-4d2a-b12c-6b6598a0d08e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_6569e547-c802-42ca-8c18-83102be49aa0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_8e37fc06-6595-4d69-afcd-07dfbbbfa88a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_6569e547-c802-42ca-8c18-83102be49aa0" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_5506ac0c-ea75-42fd-aea1-e749677a1cd5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_d57a76a7-bf2a-4e8f-bf69-aa951446d8fa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomeLossPerShareofCommonStockScheduleofCommonStockExcludedBecausetheywereAntidilutiveDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#NetIncomeLossPerShareofCommonStockScheduleofCommonStockExcludedBecausetheywereAntidilutiveDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomeLossPerShareofCommonStockScheduleofCommonStockExcludedBecausetheywereAntidilutiveDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_88ef66c3-baae-41c7-a996-5ae7e82bf153" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_deb079ae-8271-42d7-ae7d-dced1762fa7c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_88ef66c3-baae-41c7-a996-5ae7e82bf153" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_deb079ae-8271-42d7-ae7d-dced1762fa7c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_9bbe9168-aa29-4762-9878-5496d5593bc8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_deb079ae-8271-42d7-ae7d-dced1762fa7c" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_9bbe9168-aa29-4762-9878-5496d5593bc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_9bbe9168-aa29-4762-9878-5496d5593bc8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_9bbe9168-aa29-4762-9878-5496d5593bc8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_9bbe9168-aa29-4762-9878-5496d5593bc8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_6f9c7954-f6c9-478c-b4a5-78300ee387de" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_9bbe9168-aa29-4762-9878-5496d5593bc8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_6f9c7954-f6c9-478c-b4a5-78300ee387de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_7b584a7e-7fd7-4a61-91e3-7aa597825fe7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_6f9c7954-f6c9-478c-b4a5-78300ee387de" xlink:to="loc_us-gaap_EmployeeStockOptionMember_7b584a7e-7fd7-4a61-91e3-7aa597825fe7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_f4170a36-a856-4dea-a95a-90fd954cee39" xlink:href="avnw-20250328.xsd#avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_6f9c7954-f6c9-478c-b4a5-78300ee387de" xlink:to="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_f4170a36-a856-4dea-a95a-90fd954cee39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_d5cb2f9e-c8b1-44bc-a45f-fd46f64143b3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_88ef66c3-baae-41c7-a996-5ae7e82bf153" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_d5cb2f9e-c8b1-44bc-a45f-fd46f64143b3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RevenueRecognitionNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_f452ba91-f34f-4055-901e-df615a02e6c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_8c6e943d-619b-49d9-8d9f-ee912adf7186" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f452ba91-f34f-4055-901e-df615a02e6c7" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_8c6e943d-619b-49d9-8d9f-ee912adf7186" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_39d0475a-b947-418d-be49-4c6741316850" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_8c6e943d-619b-49d9-8d9f-ee912adf7186" xlink:to="loc_srt_ProductOrServiceAxis_39d0475a-b947-418d-be49-4c6741316850" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_39d0475a-b947-418d-be49-4c6741316850_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_39d0475a-b947-418d-be49-4c6741316850" xlink:to="loc_srt_ProductsAndServicesDomain_39d0475a-b947-418d-be49-4c6741316850_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e08d8769-ae63-40ea-a3d3-4b8aaea078f2" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_39d0475a-b947-418d-be49-4c6741316850" xlink:to="loc_srt_ProductsAndServicesDomain_e08d8769-ae63-40ea-a3d3-4b8aaea078f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_c2093472-e739-42a4-9ad4-a6cea6de9119" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e08d8769-ae63-40ea-a3d3-4b8aaea078f2" xlink:to="loc_us-gaap_ServiceMember_c2093472-e739-42a4-9ad4-a6cea6de9119" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_426e769c-b209-463e-b9ec-486a1441cf40" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f452ba91-f34f-4055-901e-df615a02e6c7" xlink:to="loc_us-gaap_ContractWithCustomerLiability_426e769c-b209-463e-b9ec-486a1441cf40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ContractWithCustomerLiabilityCurrentPercent_cc07127d-f4d1-4331-86b1-b8bd68036fb2" xlink:href="avnw-20250328.xsd#avnw_ContractWithCustomerLiabilityCurrentPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f452ba91-f34f-4055-901e-df615a02e6c7" xlink:to="loc_avnw_ContractWithCustomerLiabilityCurrentPercent_cc07127d-f4d1-4331-86b1-b8bd68036fb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_1f3435c4-5e15-4730-b5fb-8171145cfd01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_f452ba91-f34f-4055-901e-df615a02e6c7" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_1f3435c4-5e15-4730-b5fb-8171145cfd01" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionRemainingPerformanceObligationsDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RevenueRecognitionRemainingPerformanceObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionRemainingPerformanceObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_d89c3279-d729-458a-8f84-648131bffc80" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_d89c3279-d729-458a-8f84-648131bffc80" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_f4e0ca88-9b6e-4df5-b380-19dd8ca1b49c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_d89c3279-d729-458a-8f84-648131bffc80" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_f4e0ca88-9b6e-4df5-b380-19dd8ca1b49c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_a633a773-5578-4844-a450-6bcb1e0ede04" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_a633a773-5578-4844-a450-6bcb1e0ede04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_21cd8c48-9cda-464d-8525-9ed9ff726e7d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_21cd8c48-9cda-464d-8525-9ed9ff726e7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_a654a862-4025-48bd-8ba0-ced908fe3e06" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_a654a862-4025-48bd-8ba0-ced908fe3e06" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevenueRecognitionRemainingPerformanceObligationsDetails_1" xlink:type="simple" xlink:href="avnw-20250328.xsd#RevenueRecognitionRemainingPerformanceObligationsDetails_1"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevenueRecognitionRemainingPerformanceObligationsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_d89c3279-d729-458a-8f84-648131bffc80" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_d89c3279-d729-458a-8f84-648131bffc80" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_a633a773-5578-4844-a450-6bcb1e0ede04" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_a633a773-5578-4844-a450-6bcb1e0ede04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_21cd8c48-9cda-464d-8525-9ed9ff726e7d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationPercentage_21cd8c48-9cda-464d-8525-9ed9ff726e7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_a654a862-4025-48bd-8ba0-ced908fe3e06" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_ea8ba2d0-353b-40e5-b55f-535987743c3f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_a654a862-4025-48bd-8ba0-ced908fe3e06" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsScheduleofPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#BalanceSheetComponentsScheduleofPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsScheduleofPropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2fa9a635-eb18-4213-b307-958302b56e84" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_edf58d54-1b5a-40a4-b905-9d87a057f597" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2fa9a635-eb18-4213-b307-958302b56e84" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_edf58d54-1b5a-40a4-b905-9d87a057f597" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cf6ef51a-1d94-46a0-a2a6-92ca30f1ec8d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_edf58d54-1b5a-40a4-b905-9d87a057f597" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cf6ef51a-1d94-46a0-a2a6-92ca30f1ec8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_cf6ef51a-1d94-46a0-a2a6-92ca30f1ec8d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cf6ef51a-1d94-46a0-a2a6-92ca30f1ec8d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_cf6ef51a-1d94-46a0-a2a6-92ca30f1ec8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a28c5125-6122-48bb-9c21-062b7818fb44" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_cf6ef51a-1d94-46a0-a2a6-92ca30f1ec8d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a28c5125-6122-48bb-9c21-062b7818fb44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_e73764fa-90fc-42ad-894a-09447649c34c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a28c5125-6122-48bb-9c21-062b7818fb44" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_e73764fa-90fc-42ad-894a-09447649c34c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_SoftwareAndEquipmentMember_e119ec42-ca3f-43c7-9337-cb1ac565443e" xlink:href="avnw-20250328.xsd#avnw_SoftwareAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a28c5125-6122-48bb-9c21-062b7818fb44" xlink:to="loc_avnw_SoftwareAndEquipmentMember_e119ec42-ca3f-43c7-9337-cb1ac565443e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_81f745b9-3ae8-493c-9e92-ef877218634b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2fa9a635-eb18-4213-b307-958302b56e84" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_81f745b9-3ae8-493c-9e92-ef877218634b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_5af5f0ca-9268-4853-9a18-51deb01be7fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2fa9a635-eb18-4213-b307-958302b56e84" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_5af5f0ca-9268-4853-9a18-51deb01be7fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_4e75f123-58cf-4a05-9631-5b10bf04af62" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2fa9a635-eb18-4213-b307-958302b56e84" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_4e75f123-58cf-4a05-9631-5b10bf04af62" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#BalanceSheetComponentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_69d229ef-2eab-40a1-a24d-3125eeeb250e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6bacc506-65fe-4ea3-95eb-fa4f7e104b7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_69d229ef-2eab-40a1-a24d-3125eeeb250e" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6bacc506-65fe-4ea3-95eb-fa4f7e104b7f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_58dc644c-e8c8-4e74-b682-099b00f5f5ac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6bacc506-65fe-4ea3-95eb-fa4f7e104b7f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_58dc644c-e8c8-4e74-b682-099b00f5f5ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_58dc644c-e8c8-4e74-b682-099b00f5f5ac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_58dc644c-e8c8-4e74-b682-099b00f5f5ac" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_58dc644c-e8c8-4e74-b682-099b00f5f5ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_936086b2-b1c0-4ba1-8ebe-a141b8dacc7c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_58dc644c-e8c8-4e74-b682-099b00f5f5ac" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_936086b2-b1c0-4ba1-8ebe-a141b8dacc7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetUnderConstructionMember_4db087d6-5740-4edf-98b2-1e4967d53c34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetUnderConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_936086b2-b1c0-4ba1-8ebe-a141b8dacc7c" xlink:to="loc_us-gaap_AssetUnderConstructionMember_4db087d6-5740-4edf-98b2-1e4967d53c34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_9919252c-5a51-4c69-911b-5643a1432c18" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_69d229ef-2eab-40a1-a24d-3125eeeb250e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_9919252c-5a51-4c69-911b-5643a1432c18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_65a7c1ca-ddb3-4c20-9afe-ae392de89b47" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_69d229ef-2eab-40a1-a24d-3125eeeb250e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_65a7c1ca-ddb3-4c20-9afe-ae392de89b47" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsofAssetsandLiabilitiesScheduleofFairValuebyBalanceSheetGroupingDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#FairValueMeasurementsofAssetsandLiabilitiesScheduleofFairValuebyBalanceSheetGroupingDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsofAssetsandLiabilitiesScheduleofFairValuebyBalanceSheetGroupingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_3f49a539-af43-4484-8bbd-316abebf3746" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_da0efea6-98a4-4316-a8a0-c2e8f757ae9a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_3f49a539-af43-4484-8bbd-316abebf3746" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_da0efea6-98a4-4316-a8a0-c2e8f757ae9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_3f77d1da-6690-46ae-96ae-256eddd01265" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_da0efea6-98a4-4316-a8a0-c2e8f757ae9a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_3f77d1da-6690-46ae-96ae-256eddd01265" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_3f77d1da-6690-46ae-96ae-256eddd01265_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_3f77d1da-6690-46ae-96ae-256eddd01265" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_3f77d1da-6690-46ae-96ae-256eddd01265_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_bdc12955-8f5c-4dd7-98a7-ede027604c11" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_3f77d1da-6690-46ae-96ae-256eddd01265" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_bdc12955-8f5c-4dd7-98a7-ede027604c11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_076e4619-bd3b-44e0-844e-51e2a7074438" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_bdc12955-8f5c-4dd7-98a7-ede027604c11" xlink:to="loc_us-gaap_MoneyMarketFundsMember_076e4619-bd3b-44e0-844e-51e2a7074438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankTimeDepositsMember_78b44291-4862-482e-aad9-7ee3a1db1665" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BankTimeDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_bdc12955-8f5c-4dd7-98a7-ede027604c11" xlink:to="loc_us-gaap_BankTimeDepositsMember_78b44291-4862-482e-aad9-7ee3a1db1665" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_379cd73d-c2c5-4580-afe3-c02e945ce302" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_da0efea6-98a4-4316-a8a0-c2e8f757ae9a" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_379cd73d-c2c5-4580-afe3-c02e945ce302" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_379cd73d-c2c5-4580-afe3-c02e945ce302_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_379cd73d-c2c5-4580-afe3-c02e945ce302" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_379cd73d-c2c5-4580-afe3-c02e945ce302_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7d86c54e-f343-41af-a724-ebd90506e5cb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_379cd73d-c2c5-4580-afe3-c02e945ce302" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7d86c54e-f343-41af-a724-ebd90506e5cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_437889aa-981d-487a-8c73-bb16d33f210e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7d86c54e-f343-41af-a724-ebd90506e5cb" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_437889aa-981d-487a-8c73-bb16d33f210e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_b39cf2b9-3238-49ab-8745-920a4eec6a37" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7d86c54e-f343-41af-a724-ebd90506e5cb" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_b39cf2b9-3238-49ab-8745-920a4eec6a37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_d4401725-3a15-4e1a-8baf-61177d654d5b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_da0efea6-98a4-4316-a8a0-c2e8f757ae9a" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_d4401725-3a15-4e1a-8baf-61177d654d5b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_d4401725-3a15-4e1a-8baf-61177d654d5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_d4401725-3a15-4e1a-8baf-61177d654d5b" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_d4401725-3a15-4e1a-8baf-61177d654d5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_193d9912-60ab-4a2c-bb99-f86da277ece2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_d4401725-3a15-4e1a-8baf-61177d654d5b" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_193d9912-60ab-4a2c-bb99-f86da277ece2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_80d10be6-1d20-47c9-8955-e434456f3c21" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_193d9912-60ab-4a2c-bb99-f86da277ece2" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_80d10be6-1d20-47c9-8955-e434456f3c21" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_dffb3f33-e83e-4926-9677-dd8d233202d7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_80d10be6-1d20-47c9-8955-e434456f3c21" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_dffb3f33-e83e-4926-9677-dd8d233202d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a62db071-dd04-436e-95ff-9c1a7c8b929d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_da0efea6-98a4-4316-a8a0-c2e8f757ae9a" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a62db071-dd04-436e-95ff-9c1a7c8b929d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_a62db071-dd04-436e-95ff-9c1a7c8b929d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a62db071-dd04-436e-95ff-9c1a7c8b929d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_a62db071-dd04-436e-95ff-9c1a7c8b929d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_860cefa7-dca7-414d-9fbc-c3ad46a8c07a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_a62db071-dd04-436e-95ff-9c1a7c8b929d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_860cefa7-dca7-414d-9fbc-c3ad46a8c07a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_35d720fb-f7b2-40a9-83ba-678cb69cef21" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_860cefa7-dca7-414d-9fbc-c3ad46a8c07a" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_35d720fb-f7b2-40a9-83ba-678cb69cef21" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_9b108769-cef9-4f72-b640-890f645cb479" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_3f49a539-af43-4484-8bbd-316abebf3746" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_9b108769-cef9-4f72-b640-890f645cb479" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_dfb1e524-4638-442e-ade8-af956329f20f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_9b108769-cef9-4f72-b640-890f645cb479" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_dfb1e524-4638-442e-ade8-af956329f20f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsofAssetsandLiabilitiesNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#FairValueMeasurementsofAssetsandLiabilitiesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsofAssetsandLiabilitiesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_c1479921-9c49-43ec-8126-965b40d229e0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_729d9357-1201-4160-80f5-c9053ef4035e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_c1479921-9c49-43ec-8126-965b40d229e0" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_729d9357-1201-4160-80f5-c9053ef4035e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_79982ab2-3c51-4d09-9831-2c0846277247" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_729d9357-1201-4160-80f5-c9053ef4035e" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_79982ab2-3c51-4d09-9831-2c0846277247" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_79982ab2-3c51-4d09-9831-2c0846277247_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_79982ab2-3c51-4d09-9831-2c0846277247" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_79982ab2-3c51-4d09-9831-2c0846277247_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_087a20d9-162b-4627-991d-60a7f5e9ee74" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_79982ab2-3c51-4d09-9831-2c0846277247" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_087a20d9-162b-4627-991d-60a7f5e9ee74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_f4e2450c-49cd-479b-ae7d-a8fc6e43f240" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_087a20d9-162b-4627-991d-60a7f5e9ee74" xlink:to="loc_us-gaap_MoneyMarketFundsMember_f4e2450c-49cd-479b-ae7d-a8fc6e43f240" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_e6576d77-6712-4536-97ea-e5dc2c71c61d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_729d9357-1201-4160-80f5-c9053ef4035e" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_e6576d77-6712-4536-97ea-e5dc2c71c61d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_e6576d77-6712-4536-97ea-e5dc2c71c61d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_e6576d77-6712-4536-97ea-e5dc2c71c61d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_e6576d77-6712-4536-97ea-e5dc2c71c61d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6d688597-ce33-4191-b998-2d582432f0a8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_e6576d77-6712-4536-97ea-e5dc2c71c61d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6d688597-ce33-4191-b998-2d582432f0a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_62bce13f-5c2c-40d7-88ab-523a59451bf4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6d688597-ce33-4191-b998-2d582432f0a8" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_62bce13f-5c2c-40d7-88ab-523a59451bf4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure_ed2ac31b-5196-46cd-b057-c3f9b0d74cfb" xlink:href="avnw-20250328.xsd#avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_c1479921-9c49-43ec-8126-965b40d229e0" xlink:to="loc_avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure_ed2ac31b-5196-46cd-b057-c3f9b0d74cfb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CreditFacilityandDebtNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#CreditFacilityandDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CreditFacilityandDebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_213e87d2-5caf-4aca-97d8-7f25a082e0cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_213e87d2-5caf-4aca-97d8-7f25a082e0cf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_fa2cb7b4-405d-4fa9-a184-bb62a4ac6e02" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_213e87d2-5caf-4aca-97d8-7f25a082e0cf" xlink:to="loc_us-gaap_CreditFacilityAxis_fa2cb7b4-405d-4fa9-a184-bb62a4ac6e02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_fa2cb7b4-405d-4fa9-a184-bb62a4ac6e02_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_fa2cb7b4-405d-4fa9-a184-bb62a4ac6e02" xlink:to="loc_us-gaap_CreditFacilityDomain_fa2cb7b4-405d-4fa9-a184-bb62a4ac6e02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_3d03088b-a8cb-43c7-af1a-9c8e6547234a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_fa2cb7b4-405d-4fa9-a184-bb62a4ac6e02" xlink:to="loc_us-gaap_CreditFacilityDomain_3d03088b-a8cb-43c7-af1a-9c8e6547234a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_ee09c3cf-f13a-4a90-9e85-4c2aea0b23fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3d03088b-a8cb-43c7-af1a-9c8e6547234a" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_ee09c3cf-f13a-4a90-9e85-4c2aea0b23fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_TermLoanFacilityMember_5a6efa90-0f4f-4a96-9504-b6a0eda7c9a2" xlink:href="avnw-20250328.xsd#avnw_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3d03088b-a8cb-43c7-af1a-9c8e6547234a" xlink:to="loc_avnw_TermLoanFacilityMember_5a6efa90-0f4f-4a96-9504-b6a0eda7c9a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_cdb21a27-9923-44bd-82f2-47ee921bb0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3d03088b-a8cb-43c7-af1a-9c8e6547234a" xlink:to="loc_us-gaap_LetterOfCreditMember_cdb21a27-9923-44bd-82f2-47ee921bb0d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_SwingLineLoanMember_e2d2db4a-be9c-4c1e-a023-9ed9342a2985" xlink:href="avnw-20250328.xsd#avnw_SwingLineLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3d03088b-a8cb-43c7-af1a-9c8e6547234a" xlink:to="loc_avnw_SwingLineLoanMember_e2d2db4a-be9c-4c1e-a023-9ed9342a2985" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_1b863fc4-6864-4b18-926b-3dc4d1e23fa8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_3d03088b-a8cb-43c7-af1a-9c8e6547234a" xlink:to="loc_us-gaap_LineOfCreditMember_1b863fc4-6864-4b18-926b-3dc4d1e23fa8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_ab0dd09d-0c02-4694-bc9f-39a901424edd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_213e87d2-5caf-4aca-97d8-7f25a082e0cf" xlink:to="loc_us-gaap_DebtInstrumentAxis_ab0dd09d-0c02-4694-bc9f-39a901424edd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ab0dd09d-0c02-4694-bc9f-39a901424edd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_ab0dd09d-0c02-4694-bc9f-39a901424edd" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ab0dd09d-0c02-4694-bc9f-39a901424edd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_3171a37a-76ba-4292-8c96-1af16c327e8e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_ab0dd09d-0c02-4694-bc9f-39a901424edd" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_3171a37a-76ba-4292-8c96-1af16c327e8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_CreditFacilityMember_faa565a3-f102-41af-8b4c-10851b393b6f" xlink:href="avnw-20250328.xsd#avnw_CreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3171a37a-76ba-4292-8c96-1af16c327e8e" xlink:to="loc_avnw_CreditFacilityMember_faa565a3-f102-41af-8b4c-10851b393b6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_TermLoanFacilityMember_50704046-cf6f-42ad-b36d-941cad51aa29" xlink:href="avnw-20250328.xsd#avnw_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3171a37a-76ba-4292-8c96-1af16c327e8e" xlink:to="loc_avnw_TermLoanFacilityMember_50704046-cf6f-42ad-b36d-941cad51aa29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_1064c67b-e91f-4348-a473-9f10c7db8442" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_213e87d2-5caf-4aca-97d8-7f25a082e0cf" xlink:to="loc_us-gaap_VariableRateAxis_1064c67b-e91f-4348-a473-9f10c7db8442" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_1064c67b-e91f-4348-a473-9f10c7db8442_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_1064c67b-e91f-4348-a473-9f10c7db8442" xlink:to="loc_us-gaap_VariableRateDomain_1064c67b-e91f-4348-a473-9f10c7db8442_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_72714428-8226-42b6-a15b-ac96e45a0187" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_1064c67b-e91f-4348-a473-9f10c7db8442" xlink:to="loc_us-gaap_VariableRateDomain_72714428-8226-42b6-a15b-ac96e45a0187" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_0a36fe1a-e3b9-4e62-a614-be9403c6d4cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_72714428-8226-42b6-a15b-ac96e45a0187" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_0a36fe1a-e3b9-4e62-a614-be9403c6d4cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_e414afd0-86b4-49a3-8524-4dbee59ca35a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_72714428-8226-42b6-a15b-ac96e45a0187" xlink:to="loc_us-gaap_BaseRateMember_e414afd0-86b4-49a3-8524-4dbee59ca35a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_7f88f7fa-438c-481a-ac4b-dac0faf336a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_213e87d2-5caf-4aca-97d8-7f25a082e0cf" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_7f88f7fa-438c-481a-ac4b-dac0faf336a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_7f88f7fa-438c-481a-ac4b-dac0faf336a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_7f88f7fa-438c-481a-ac4b-dac0faf336a5" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_7f88f7fa-438c-481a-ac4b-dac0faf336a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_dec11b96-890a-4f2e-b77f-df9aab9c1bf0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_7f88f7fa-438c-481a-ac4b-dac0faf336a5" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_dec11b96-890a-4f2e-b77f-df9aab9c1bf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputEbitdaMultipleMember_663e65fa-a338-408f-b69d-8e8ef4fd89c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MeasurementInputEbitdaMultipleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_dec11b96-890a-4f2e-b77f-df9aab9c1bf0" xlink:to="loc_us-gaap_MeasurementInputEbitdaMultipleMember_663e65fa-a338-408f-b69d-8e8ef4fd89c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentLeverageRatioAxis_ce933a55-fc0f-4acd-aeff-f289408e0a67" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentLeverageRatioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_213e87d2-5caf-4aca-97d8-7f25a082e0cf" xlink:to="loc_avnw_DebtInstrumentLeverageRatioAxis_ce933a55-fc0f-4acd-aeff-f289408e0a67" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentLeverageRatioDomain_ce933a55-fc0f-4acd-aeff-f289408e0a67_default" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentLeverageRatioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_avnw_DebtInstrumentLeverageRatioAxis_ce933a55-fc0f-4acd-aeff-f289408e0a67" xlink:to="loc_avnw_DebtInstrumentLeverageRatioDomain_ce933a55-fc0f-4acd-aeff-f289408e0a67_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentLeverageRatioDomain_d9ee0da3-36b0-4908-a9f7-b4c195d4b3d0" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentLeverageRatioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_avnw_DebtInstrumentLeverageRatioAxis_ce933a55-fc0f-4acd-aeff-f289408e0a67" xlink:to="loc_avnw_DebtInstrumentLeverageRatioDomain_d9ee0da3-36b0-4908-a9f7-b4c195d4b3d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_LeverageRatio275Member_991108e0-2049-49e1-b702-96bbfb4d88f8" xlink:href="avnw-20250328.xsd#avnw_LeverageRatio275Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_avnw_DebtInstrumentLeverageRatioDomain_d9ee0da3-36b0-4908-a9f7-b4c195d4b3d0" xlink:to="loc_avnw_LeverageRatio275Member_991108e0-2049-49e1-b702-96bbfb4d88f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_LeverageRatio250Member_dc5a9b74-22a4-4ca2-9e7d-7a97257999aa" xlink:href="avnw-20250328.xsd#avnw_LeverageRatio250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_avnw_DebtInstrumentLeverageRatioDomain_d9ee0da3-36b0-4908-a9f7-b4c195d4b3d0" xlink:to="loc_avnw_LeverageRatio250Member_dc5a9b74-22a4-4ca2-9e7d-7a97257999aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_69d9e8fc-2032-4434-8145-04b05e8061ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_69d9e8fc-2032-4434-8145-04b05e8061ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_8a295961-45f0-4efe-8db9-793e69900433" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_8a295961-45f0-4efe-8db9-793e69900433" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_5776e544-9dcd-4dab-b1b1-d63cd7700767" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_5776e544-9dcd-4dab-b1b1-d63cd7700767" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_624bf9d1-cd46-40ca-be39-cc44c81f33f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_624bf9d1-cd46-40ca-be39-cc44c81f33f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_fddb2f87-6641-4ccd-8e76-c9ead058af66" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_fddb2f87-6641-4ccd-8e76-c9ead058af66" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_b8b75fc0-8d7f-486c-8184-534316d89d05" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RepaymentsOfLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_RepaymentsOfLinesOfCredit_b8b75fc0-8d7f-486c-8184-534316d89d05" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_ea030062-5f07-4b0a-bfb1-dc691ea83159" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_ea030062-5f07-4b0a-bfb1-dc691ea83159" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_22ebc139-c008-416e-b2fa-1d832778bcb1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_22ebc139-c008-416e-b2fa-1d832778bcb1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentFixedChargeCoverageRatio_93144fad-5fbb-4dea-b54a-6184dab8636e" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentFixedChargeCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_avnw_DebtInstrumentFixedChargeCoverageRatio_93144fad-5fbb-4dea-b54a-6184dab8636e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentMaximumLeverageRatioPeriodOne_3630096d-dcce-4de2-913a-b85c1a90d232" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentMaximumLeverageRatioPeriodOne"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_avnw_DebtInstrumentMaximumLeverageRatioPeriodOne_3630096d-dcce-4de2-913a-b85c1a90d232" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentMaximumLeverageRatioPeriodTwo_ae95f68b-d7a0-4c8c-8a30-6d8b3b791232" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentMaximumLeverageRatioPeriodTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_avnw_DebtInstrumentMaximumLeverageRatioPeriodTwo_ae95f68b-d7a0-4c8c-8a30-6d8b3b791232" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentMaximumLeverageRatioTermInQuarters_76654999-3a33-4fa2-8701-feb4bb5feae6" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentMaximumLeverageRatioTermInQuarters"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_avnw_DebtInstrumentMaximumLeverageRatioTermInQuarters_76654999-3a33-4fa2-8701-feb4bb5feae6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_DebtInstrumentMaximumLeverageRatioPeriodThree_06a3f65b-51df-4b79-83e4-08bfcf647b32" xlink:href="avnw-20250328.xsd#avnw_DebtInstrumentMaximumLeverageRatioPeriodThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_7b2e2184-4c45-440c-8e71-25ae7943641a" xlink:to="loc_avnw_DebtInstrumentMaximumLeverageRatioPeriodThree_06a3f65b-51df-4b79-83e4-08bfcf647b32" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CreditFacilityandDebtScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#CreditFacilityandDebtScheduleofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CreditFacilityandDebtScheduleofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_347a4cfe-949a-4050-89ff-a0950a27a59c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_af30f8a7-7d50-4c5a-8e27-10d1123f82d0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_347a4cfe-949a-4050-89ff-a0950a27a59c" xlink:to="loc_us-gaap_DebtInstrumentTable_af30f8a7-7d50-4c5a-8e27-10d1123f82d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_d3275624-5395-4626-a73d-2cc5e7d831c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_af30f8a7-7d50-4c5a-8e27-10d1123f82d0" xlink:to="loc_us-gaap_CreditFacilityAxis_d3275624-5395-4626-a73d-2cc5e7d831c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d3275624-5395-4626-a73d-2cc5e7d831c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_d3275624-5395-4626-a73d-2cc5e7d831c7" xlink:to="loc_us-gaap_CreditFacilityDomain_d3275624-5395-4626-a73d-2cc5e7d831c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_01b1d9c2-0d3c-4983-a8d5-06bed79856cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_d3275624-5395-4626-a73d-2cc5e7d831c7" xlink:to="loc_us-gaap_CreditFacilityDomain_01b1d9c2-0d3c-4983-a8d5-06bed79856cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_9797b89d-c4fc-452a-b097-ca9b4a9d4ffe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_01b1d9c2-0d3c-4983-a8d5-06bed79856cf" xlink:to="loc_us-gaap_LineOfCreditMember_9797b89d-c4fc-452a-b097-ca9b4a9d4ffe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_7caaedf7-e2e0-4e1b-8b4b-4d212b5cfd03" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_af30f8a7-7d50-4c5a-8e27-10d1123f82d0" xlink:to="loc_us-gaap_DebtInstrumentAxis_7caaedf7-e2e0-4e1b-8b4b-4d212b5cfd03" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7caaedf7-e2e0-4e1b-8b4b-4d212b5cfd03_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_7caaedf7-e2e0-4e1b-8b4b-4d212b5cfd03" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7caaedf7-e2e0-4e1b-8b4b-4d212b5cfd03_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_10d4a536-0339-497e-a535-f5702555d592" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_7caaedf7-e2e0-4e1b-8b4b-4d212b5cfd03" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_10d4a536-0339-497e-a535-f5702555d592" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_ccefc4d1-f84c-4110-bc7e-37daed1022bd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_10d4a536-0339-497e-a535-f5702555d592" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_ccefc4d1-f84c-4110-bc7e-37daed1022bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_TermLoanFacilityMember_ad3ddf09-12ae-4616-99b0-b2faf67acd01" xlink:href="avnw-20250328.xsd#avnw_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_10d4a536-0339-497e-a535-f5702555d592" xlink:to="loc_avnw_TermLoanFacilityMember_ad3ddf09-12ae-4616-99b0-b2faf67acd01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_65be9ec8-47a4-4af0-a2d5-6a527369ca51" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_347a4cfe-949a-4050-89ff-a0950a27a59c" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_65be9ec8-47a4-4af0-a2d5-6a527369ca51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_f88b37e0-bfcf-4b28-8b40-77b30e0226ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_347a4cfe-949a-4050-89ff-a0950a27a59c" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_f88b37e0-bfcf-4b28-8b40-77b30e0226ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_901691bf-3f16-4111-a99b-62288a96cb88" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_347a4cfe-949a-4050-89ff-a0950a27a59c" xlink:to="loc_us-gaap_LongTermDebt_901691bf-3f16-4111-a99b-62288a96cb88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_12969fd4-8c12-401a-a6a6-e638ca565a93" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_347a4cfe-949a-4050-89ff-a0950a27a59c" xlink:to="loc_us-gaap_LongTermDebtCurrent_12969fd4-8c12-401a-a6a6-e638ca565a93" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_9941397f-10d8-468b-8387-ff3e81df5ec8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_347a4cfe-949a-4050-89ff-a0950a27a59c" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_9941397f-10d8-468b-8387-ff3e81df5ec8" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RestructuringScheduleofRestructuringRelatedActivitiesDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RestructuringScheduleofRestructuringRelatedActivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RestructuringScheduleofRestructuringRelatedActivitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_0bee49bf-f491-4261-a67b-38ba2a454bce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_91fed165-e1a2-477f-9da7-413436dc4fa2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_0bee49bf-f491-4261-a67b-38ba2a454bce" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_91fed165-e1a2-477f-9da7-413436dc4fa2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_95db5ac1-a896-49be-b1a1-e2110c31c325" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_91fed165-e1a2-477f-9da7-413436dc4fa2" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_95db5ac1-a896-49be-b1a1-e2110c31c325" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_95db5ac1-a896-49be-b1a1-e2110c31c325_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_95db5ac1-a896-49be-b1a1-e2110c31c325" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_95db5ac1-a896-49be-b1a1-e2110c31c325_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_7e1d0f25-b5a2-473a-b97f-0bd8eb3350d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_95db5ac1-a896-49be-b1a1-e2110c31c325" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_7e1d0f25-b5a2-473a-b97f-0bd8eb3350d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_1f694982-0bf1-4194-a68e-861545b76db8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_7e1d0f25-b5a2-473a-b97f-0bd8eb3350d1" xlink:to="loc_us-gaap_EmployeeSeveranceMember_1f694982-0bf1-4194-a68e-861545b76db8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FacilityClosingMember_a2ddaaad-a971-4731-84fe-30765ad7f19b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FacilityClosingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_7e1d0f25-b5a2-473a-b97f-0bd8eb3350d1" xlink:to="loc_us-gaap_FacilityClosingMember_a2ddaaad-a971-4731-84fe-30765ad7f19b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_120e4802-3188-4e7f-9e6a-8e401a1bd278" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_0bee49bf-f491-4261-a67b-38ba2a454bce" xlink:to="loc_us-gaap_RestructuringReserveRollForward_120e4802-3188-4e7f-9e6a-8e401a1bd278" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_8cc19c04-0f51-4541-887c-c0445966c375" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_120e4802-3188-4e7f-9e6a-8e401a1bd278" xlink:to="loc_us-gaap_RestructuringReserve_8cc19c04-0f51-4541-887c-c0445966c375" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_b3a56d1b-a271-45d2-86e8-0dfd1cbf4a74" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_120e4802-3188-4e7f-9e6a-8e401a1bd278" xlink:to="loc_us-gaap_RestructuringCharges_b3a56d1b-a271-45d2-86e8-0dfd1cbf4a74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_b978d740-9a60-4119-98b0-86d081a77ff7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_120e4802-3188-4e7f-9e6a-8e401a1bd278" xlink:to="loc_us-gaap_PaymentsForRestructuring_b978d740-9a60-4119-98b0-86d081a77ff7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_9df45b9c-4cd3-4fdc-abf0-6c488fa96887" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserve"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#StockholdersEquityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2c652e1e-9500-4189-a1c1-651c3cc10430" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2c652e1e-9500-4189-a1c1-651c3cc10430" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_e8e8a046-a9c1-44b9-9dd9-64acdd59807a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2c652e1e-9500-4189-a1c1-651c3cc10430" xlink:to="loc_us-gaap_PlanNameAxis_e8e8a046-a9c1-44b9-9dd9-64acdd59807a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_e8e8a046-a9c1-44b9-9dd9-64acdd59807a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_e8e8a046-a9c1-44b9-9dd9-64acdd59807a" xlink:to="loc_us-gaap_PlanNameDomain_e8e8a046-a9c1-44b9-9dd9-64acdd59807a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_793d692e-553d-4151-86a7-93b9de7aa874" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_e8e8a046-a9c1-44b9-9dd9-64acdd59807a" xlink:to="loc_us-gaap_PlanNameDomain_793d692e-553d-4151-86a7-93b9de7aa874" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_A2018IncentivePlanMember_cf2ee89f-3b40-4693-b863-47fd76bea542" xlink:href="avnw-20250328.xsd#avnw_A2018IncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_793d692e-553d-4151-86a7-93b9de7aa874" xlink:to="loc_avnw_A2018IncentivePlanMember_cf2ee89f-3b40-4693-b863-47fd76bea542" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_0863b6d0-4b92-488b-855e-3a20a5cb6c82" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2c652e1e-9500-4189-a1c1-651c3cc10430" xlink:to="loc_us-gaap_AwardTypeAxis_0863b6d0-4b92-488b-855e-3a20a5cb6c82" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0863b6d0-4b92-488b-855e-3a20a5cb6c82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_0863b6d0-4b92-488b-855e-3a20a5cb6c82" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0863b6d0-4b92-488b-855e-3a20a5cb6c82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a93075-242d-4d66-a80e-261a9689c7d9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_0863b6d0-4b92-488b-855e-3a20a5cb6c82" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a93075-242d-4d66-a80e-261a9689c7d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_f84e7db1-5ac2-4235-afe1-6f35499479c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a93075-242d-4d66-a80e-261a9689c7d9" xlink:to="loc_us-gaap_EmployeeStockOptionMember_f84e7db1-5ac2-4235-afe1-6f35499479c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_0f96d20b-43c9-4ba3-bc52-064e493f7872" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a93075-242d-4d66-a80e-261a9689c7d9" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_0f96d20b-43c9-4ba3-bc52-064e493f7872" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_1636d5b7-cc76-4727-a88c-654ac8ecc560" xlink:href="avnw-20250328.xsd#avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a93075-242d-4d66-a80e-261a9689c7d9" xlink:to="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_1636d5b7-cc76-4727-a88c-654ac8ecc560" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_f1cfbd01-3ff4-48d9-b325-34919ae12664" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_83a93075-242d-4d66-a80e-261a9689c7d9" xlink:to="loc_us-gaap_PerformanceSharesMember_f1cfbd01-3ff4-48d9-b325-34919ae12664" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_5a0a0dfc-f65d-445c-8f8b-5d34f11e772f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_5a0a0dfc-f65d-445c-8f8b-5d34f11e772f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_6056bbf4-4adf-4c6c-9ef3-b3b644645e38" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_6056bbf4-4adf-4c6c-9ef3-b3b644645e38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_34f8cf18-f355-4b75-89bb-2530460c2724" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_34f8cf18-f355-4b75-89bb-2530460c2724" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_6c095d3c-afed-478d-9141-d12c4ff5adb7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_6c095d3c-afed-478d-9141-d12c4ff5adb7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfStockIncentivePlans_dc0253cf-2b14-43c3-8362-064fb0284949" xlink:href="avnw-20250328.xsd#avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfStockIncentivePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_avnw_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfStockIncentivePlans_dc0253cf-2b14-43c3-8362-064fb0284949" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_2d6692a1-995b-4e7e-82bd-4ebf9cb1c1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_2d6692a1-995b-4e7e-82bd-4ebf9cb1c1b4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_e5ca5537-daee-40e9-98b6-295573f66c8f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_e5ca5537-daee-40e9-98b6-295573f66c8f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_f419374a-35b5-4871-9153-f1bcd1fa8a86" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_f419374a-35b5-4871-9153-f1bcd1fa8a86" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_488cfe41-809c-4e1b-b1f4-29826972a432" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_488cfe41-809c-4e1b-b1f4-29826972a432" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_4473dcf3-0142-4672-9af2-3000a8f3e977" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_4473dcf3-0142-4672-9af2-3000a8f3e977" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_012e0e4c-4c61-498c-be3b-33e8bbe26169" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3cac28dc-782b-4302-b5af-22869d875dab" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_012e0e4c-4c61-498c-be3b-33e8bbe26169" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityScheduleofStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#StockholdersEquityScheduleofStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityScheduleofStockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_56aa1b2a-21c1-4f6e-93c9-c2efa0106695" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_123e41ba-8194-49bc-abda-3c36674ce645" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_56aa1b2a-21c1-4f6e-93c9-c2efa0106695" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_123e41ba-8194-49bc-abda-3c36674ce645" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_ed75ee67-c9ec-482c-b124-cffc40f9c5e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_123e41ba-8194-49bc-abda-3c36674ce645" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_ed75ee67-c9ec-482c-b124-cffc40f9c5e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_ed75ee67-c9ec-482c-b124-cffc40f9c5e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_ed75ee67-c9ec-482c-b124-cffc40f9c5e8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_ed75ee67-c9ec-482c-b124-cffc40f9c5e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_739fa9c1-114b-4ed9-ae41-836d4b9b2298" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_ed75ee67-c9ec-482c-b124-cffc40f9c5e8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_739fa9c1-114b-4ed9-ae41-836d4b9b2298" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_51e47b5a-dbda-4bd5-b1ea-7e4b9fb29afb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_739fa9c1-114b-4ed9-ae41-836d4b9b2298" xlink:to="loc_us-gaap_CostOfSalesMember_51e47b5a-dbda-4bd5-b1ea-7e4b9fb29afb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_c37fcf85-1218-4ca4-bd9a-c123788ab36a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_739fa9c1-114b-4ed9-ae41-836d4b9b2298" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_c37fcf85-1218-4ca4-bd9a-c123788ab36a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_f2ba513c-e837-4507-a0d6-52465f1ad952" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_739fa9c1-114b-4ed9-ae41-836d4b9b2298" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_f2ba513c-e837-4507-a0d6-52465f1ad952" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_e70da710-2739-4c2a-9ff7-15503b69a9f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_123e41ba-8194-49bc-abda-3c36674ce645" xlink:to="loc_us-gaap_AwardTypeAxis_e70da710-2739-4c2a-9ff7-15503b69a9f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e70da710-2739-4c2a-9ff7-15503b69a9f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_e70da710-2739-4c2a-9ff7-15503b69a9f3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e70da710-2739-4c2a-9ff7-15503b69a9f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7f8afa94-08c5-44d5-a4bd-bfbc57d59bad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_e70da710-2739-4c2a-9ff7-15503b69a9f3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7f8afa94-08c5-44d5-a4bd-bfbc57d59bad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_2356abee-29e1-4d3b-8b04-2eaa5f1af034" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7f8afa94-08c5-44d5-a4bd-bfbc57d59bad" xlink:to="loc_us-gaap_EmployeeStockOptionMember_2356abee-29e1-4d3b-8b04-2eaa5f1af034" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_bde10a8e-96f1-469d-9b26-5119985310da" xlink:href="avnw-20250328.xsd#avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7f8afa94-08c5-44d5-a4bd-bfbc57d59bad" xlink:to="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_bde10a8e-96f1-469d-9b26-5119985310da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_db466306-6919-4234-83e6-1f0b61c5b02f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_56aa1b2a-21c1-4f6e-93c9-c2efa0106695" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_db466306-6919-4234-83e6-1f0b61c5b02f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#SegmentandGeographicInformationDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentandGeographicInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_fa9a3f6b-2a8e-4d14-b88f-65f58a92d946" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_e6f326e7-5f6d-455e-9754-cedcadf961ec" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_fa9a3f6b-2a8e-4d14-b88f-65f58a92d946" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_e6f326e7-5f6d-455e-9754-cedcadf961ec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_f1401a16-20a4-42ed-bfd9-adf5b4d7b933" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_e6f326e7-5f6d-455e-9754-cedcadf961ec" xlink:to="loc_srt_StatementGeographicalAxis_f1401a16-20a4-42ed-bfd9-adf5b4d7b933" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_f1401a16-20a4-42ed-bfd9-adf5b4d7b933_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_f1401a16-20a4-42ed-bfd9-adf5b4d7b933" xlink:to="loc_srt_SegmentGeographicalDomain_f1401a16-20a4-42ed-bfd9-adf5b4d7b933_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_da6eeb3b-254c-45ff-b75b-7ec6544aafe8" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_f1401a16-20a4-42ed-bfd9-adf5b4d7b933" xlink:to="loc_srt_SegmentGeographicalDomain_da6eeb3b-254c-45ff-b75b-7ec6544aafe8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NorthAmericaMember_ba359618-2ff8-4339-8b45-ac1fbfe74311" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_NorthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6eeb3b-254c-45ff-b75b-7ec6544aafe8" xlink:to="loc_srt_NorthAmericaMember_ba359618-2ff8-4339-8b45-ac1fbfe74311" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_AfricaAndMiddleEastMember_beb069e9-28d6-49fa-a9a4-d2947a69b318" xlink:href="avnw-20250328.xsd#avnw_AfricaAndMiddleEastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6eeb3b-254c-45ff-b75b-7ec6544aafe8" xlink:to="loc_avnw_AfricaAndMiddleEastMember_beb069e9-28d6-49fa-a9a4-d2947a69b318" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_69fc5ce5-d851-4ef0-b8e1-e10df353c94e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6eeb3b-254c-45ff-b75b-7ec6544aafe8" xlink:to="loc_srt_EuropeMember_69fc5ce5-d851-4ef0-b8e1-e10df353c94e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_LatinAmericaAndAsiaPacificMember_8919306c-7f4e-4dd6-a9eb-314ee464d262" xlink:href="avnw-20250328.xsd#avnw_LatinAmericaAndAsiaPacificMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_da6eeb3b-254c-45ff-b75b-7ec6544aafe8" xlink:to="loc_avnw_LatinAmericaAndAsiaPacificMember_8919306c-7f4e-4dd6-a9eb-314ee464d262" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_90e1c9bd-3d38-48e6-b5a9-fd23fd00b84e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_fa9a3f6b-2a8e-4d14-b88f-65f58a92d946" xlink:to="loc_us-gaap_NumberOfReportableSegments_90e1c9bd-3d38-48e6-b5a9-fd23fd00b84e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_7e901452-5f06-4c33-9347-bc21e765422b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_fa9a3f6b-2a8e-4d14-b88f-65f58a92d946" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_7e901452-5f06-4c33-9347-bc21e765422b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/AcquisitionsNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#AcquisitionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_711e993c-e347-4b3a-a647-c6a8acc3d9d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_711e993c-e347-4b3a-a647-c6a8acc3d9d1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_6711507d-4ee9-418f-a93f-cad7b3d45b5d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_711e993c-e347-4b3a-a647-c6a8acc3d9d1" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_6711507d-4ee9-418f-a93f-cad7b3d45b5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6711507d-4ee9-418f-a93f-cad7b3d45b5d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_6711507d-4ee9-418f-a93f-cad7b3d45b5d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6711507d-4ee9-418f-a93f-cad7b3d45b5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5575a013-1ab9-413e-b213-2cc3d004778f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_6711507d-4ee9-418f-a93f-cad7b3d45b5d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5575a013-1ab9-413e-b213-2cc3d004778f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_A4RFLimitedMember_8dfab21e-e953-47b2-b58c-8303a2c74336" xlink:href="avnw-20250328.xsd#avnw_A4RFLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5575a013-1ab9-413e-b213-2cc3d004778f" xlink:to="loc_avnw_A4RFLimitedMember_8dfab21e-e953-47b2-b58c-8303a2c74336" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECCorporationMember_9262db5b-f441-44ea-9b1c-781033f5cb21" xlink:href="avnw-20250328.xsd#avnw_NECCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_5575a013-1ab9-413e-b213-2cc3d004778f" xlink:to="loc_avnw_NECCorporationMember_9262db5b-f441-44ea-9b1c-781033f5cb21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_500b1a49-c242-4c40-b05d-90eec8ee4cd9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_500b1a49-c242-4c40-b05d-90eec8ee4cd9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_a3f08c7c-2ff5-4743-9f40-6787dd9aca12" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAcquiredFromAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_a3f08c7c-2ff5-4743-9f40-6787dd9aca12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsPeriodIncreaseDecrease_57459170-ce86-42d3-a5dd-9e2c81a5feff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsPeriodIncreaseDecrease_57459170-ce86-42d3-a5dd-9e2c81a5feff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_958ea58d-c365-4b1c-86e6-66e5a82f0459" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_958ea58d-c365-4b1c-86e6-66e5a82f0459" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPeriodIncreaseDecrease_3cde9fcd-eb22-46fc-8e74-88a035792ec9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_GoodwillPeriodIncreaseDecrease_3cde9fcd-eb22-46fc-8e74-88a035792ec9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_92ea5332-8913-4f80-bf75-3399b802e074" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_92ea5332-8913-4f80-bf75-3399b802e074" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_af315c02-734c-43d3-85b5-d7d69c0fe9df" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_af315c02-734c-43d3-85b5-d7d69c0fe9df" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_6fccec43-56ae-4290-9d73-b84b0ce6d99c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_6fccec43-56ae-4290-9d73-b84b0ce6d99c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_8a8891a6-a375-4f2e-b5bf-61b55d5a69b8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_7330f5f8-079a-412c-94f0-5a0f231e9f65" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_8a8891a6-a375-4f2e-b5bf-61b55d5a69b8" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/AcquisitionsScheduleofPreliminaryPurchaseConsiderationDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#AcquisitionsScheduleofPreliminaryPurchaseConsiderationDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/AcquisitionsScheduleofPreliminaryPurchaseConsiderationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_059f3be3-cbf4-4e92-a043-6047d247b9a0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_059f3be3-cbf4-4e92-a043-6047d247b9a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_0b78b2b2-c56d-4818-9622-69a8d87b47b8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_059f3be3-cbf4-4e92-a043-6047d247b9a0" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_0b78b2b2-c56d-4818-9622-69a8d87b47b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0b78b2b2-c56d-4818-9622-69a8d87b47b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_0b78b2b2-c56d-4818-9622-69a8d87b47b8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_0b78b2b2-c56d-4818-9622-69a8d87b47b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f05ae8e7-1f05-41a0-956b-c0ef0aef3a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_0b78b2b2-c56d-4818-9622-69a8d87b47b8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f05ae8e7-1f05-41a0-956b-c0ef0aef3a2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_A4RFLimitedMember_47ad76dc-16c7-449e-b324-042751e98bfd" xlink:href="avnw-20250328.xsd#avnw_A4RFLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f05ae8e7-1f05-41a0-956b-c0ef0aef3a2b" xlink:to="loc_avnw_A4RFLimitedMember_47ad76dc-16c7-449e-b324-042751e98bfd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECCorporationMember_2fab87bb-4956-4d41-9af1-62b7944f792c" xlink:href="avnw-20250328.xsd#avnw_NECCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f05ae8e7-1f05-41a0-956b-c0ef0aef3a2b" xlink:to="loc_avnw_NECCorporationMember_2fab87bb-4956-4d41-9af1-62b7944f792c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_960ee659-5100-4a28-af08-dd90bd18b005" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_059f3be3-cbf4-4e92-a043-6047d247b9a0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_960ee659-5100-4a28-af08-dd90bd18b005" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_960ee659-5100-4a28-af08-dd90bd18b005_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_960ee659-5100-4a28-af08-dd90bd18b005" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_960ee659-5100-4a28-af08-dd90bd18b005_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8e04357a-6910-4a18-afde-5cdf50361af2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_960ee659-5100-4a28-af08-dd90bd18b005" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8e04357a-6910-4a18-afde-5cdf50361af2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_e6b23487-adb4-43e1-9f22-0d7ebe5edd39" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8e04357a-6910-4a18-afde-5cdf50361af2" xlink:to="loc_us-gaap_CustomerRelationshipsMember_e6b23487-adb4-43e1-9f22-0d7ebe5edd39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_2744c75b-3f9f-487d-95ba-bf7559e76e22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TechnologyBasedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8e04357a-6910-4a18-afde-5cdf50361af2" xlink:to="loc_us-gaap_TechnologyBasedIntangibleAssetsMember_2744c75b-3f9f-487d-95ba-bf7559e76e22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_10e4dbe4-125b-4cbf-980d-5f6593dc6824" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8e04357a-6910-4a18-afde-5cdf50361af2" xlink:to="loc_us-gaap_TradeNamesMember_10e4dbe4-125b-4cbf-980d-5f6593dc6824" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_87bf2c66-b73f-427e-8aa8-1e2aa9006b51" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_87bf2c66-b73f-427e-8aa8-1e2aa9006b51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_bd37ae78-23a8-4607-8669-46250be50499" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_bd37ae78-23a8-4607-8669-46250be50499" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_38276235-e929-4cca-a5da-ab515490da0a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_38276235-e929-4cca-a5da-ab515490da0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_0b2a46df-9df4-4a1d-817c-074f132f6c06" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_0b2a46df-9df4-4a1d-817c-074f132f6c06" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_d8629d38-5ff3-47d5-ad74-4738b8a96b88" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_d8629d38-5ff3-47d5-ad74-4738b8a96b88" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2de11d4b-46d4-4103-aa3c-44b2074069b8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2de11d4b-46d4-4103-aa3c-44b2074069b8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_9fbf3236-3f5d-4a9e-a91a-cbc115f814b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_9fbf3236-3f5d-4a9e-a91a-cbc115f814b4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_081fba94-8ab5-4598-a60d-ba446e1db4b2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_081fba94-8ab5-4598-a60d-ba446e1db4b2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_9eeb5422-e672-44e4-ace0-1ade9ffe80ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_9eeb5422-e672-44e4-ace0-1ade9ffe80ab" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_1f0e3888-4d67-44b9-8e3f-1088397aadbb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_Goodwill_1f0e3888-4d67-44b9-8e3f-1088397aadbb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_c0ba859b-3e17-48a4-b83b-c758d2867e82" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70181570-3444-4a98-9341-0bd27a21ebdf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_c0ba859b-3e17-48a4-b83b-c758d2867e82" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/AcquisitionsScheduleofProFormaAdjustmentsDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#AcquisitionsScheduleofProFormaAdjustmentsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/AcquisitionsScheduleofProFormaAdjustmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_1f806c69-7bd6-40c9-8981-716276514731" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_3b029127-ad27-48cc-a90c-a5978809329a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_1f806c69-7bd6-40c9-8981-716276514731" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_3b029127-ad27-48cc-a90c-a5978809329a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_7387b771-f0f2-4f00-866b-7b9d9d75beb5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTable_3b029127-ad27-48cc-a90c-a5978809329a" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_7387b771-f0f2-4f00-866b-7b9d9d75beb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7387b771-f0f2-4f00-866b-7b9d9d75beb5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_7387b771-f0f2-4f00-866b-7b9d9d75beb5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_7387b771-f0f2-4f00-866b-7b9d9d75beb5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6cadc5f6-0bca-41d4-aae7-d5754aec5c17" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_7387b771-f0f2-4f00-866b-7b9d9d75beb5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6cadc5f6-0bca-41d4-aae7-d5754aec5c17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECCorporationMember_c4c2d6ad-9927-4dc5-b99a-f2a59b1bf49c" xlink:href="avnw-20250328.xsd#avnw_NECCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6cadc5f6-0bca-41d4-aae7-d5754aec5c17" xlink:to="loc_avnw_NECCorporationMember_c4c2d6ad-9927-4dc5-b99a-f2a59b1bf49c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_dced05bf-61b6-41bf-a718-d2ca19b430f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_1f806c69-7bd6-40c9-8981-716276514731" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_dced05bf-61b6-41bf-a718-d2ca19b430f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_9cfcf735-3135-4e74-91fe-a0cb605e2b7e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_1f806c69-7bd6-40c9-8981-716276514731" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_9cfcf735-3135-4e74-91fe-a0cb605e2b7e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#CommitmentsandContingenciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_e28b5e81-f0af-41db-9685-49cf0d9b16b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_397d196b-00ac-44be-85ac-229f653c074a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_e28b5e81-f0af-41db-9685-49cf0d9b16b5" xlink:to="loc_us-gaap_OtherCommitmentsTable_397d196b-00ac-44be-85ac-229f653c074a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4b172320-d299-4925-be91-390d2b9c2bc8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_397d196b-00ac-44be-85ac-229f653c074a" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4b172320-d299-4925-be91-390d2b9c2bc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_4b172320-d299-4925-be91-390d2b9c2bc8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4b172320-d299-4925-be91-390d2b9c2bc8" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_4b172320-d299-4925-be91-390d2b9c2bc8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_023713ea-d9ba-4e55-8b0f-c3167347def7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4b172320-d299-4925-be91-390d2b9c2bc8" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_023713ea-d9ba-4e55-8b0f-c3167347def7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_PurchaseObligationsWithSuppliersOfContractManufacturersMember_feb384b2-4825-49a9-ae55-8ba6c1a0fe7d" xlink:href="avnw-20250328.xsd#avnw_PurchaseObligationsWithSuppliersOfContractManufacturersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_023713ea-d9ba-4e55-8b0f-c3167347def7" xlink:to="loc_avnw_PurchaseObligationsWithSuppliersOfContractManufacturersMember_feb384b2-4825-49a9-ae55-8ba6c1a0fe7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ContractualObligationsAssociatedWithSoftwareAsServiceAndSoftwareMember_b65f1db1-6beb-4219-beff-daad01368819" xlink:href="avnw-20250328.xsd#avnw_ContractualObligationsAssociatedWithSoftwareAsServiceAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_023713ea-d9ba-4e55-8b0f-c3167347def7" xlink:to="loc_avnw_ContractualObligationsAssociatedWithSoftwareAsServiceAndSoftwareMember_b65f1db1-6beb-4219-beff-daad01368819" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_823f7753-be85-4ef9-b130-282935c6b37d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_397d196b-00ac-44be-85ac-229f653c074a" xlink:to="loc_srt_RangeAxis_823f7753-be85-4ef9-b130-282935c6b37d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_823f7753-be85-4ef9-b130-282935c6b37d_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_823f7753-be85-4ef9-b130-282935c6b37d" xlink:to="loc_srt_RangeMember_823f7753-be85-4ef9-b130-282935c6b37d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_0e5ac7d7-0f18-4c10-994b-29c4a66d50d8" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_823f7753-be85-4ef9-b130-282935c6b37d" xlink:to="loc_srt_RangeMember_0e5ac7d7-0f18-4c10-994b-29c4a66d50d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e4886700-82e4-44ca-87c7-afcc458d40d2" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0e5ac7d7-0f18-4c10-994b-29c4a66d50d8" xlink:to="loc_srt_MaximumMember_e4886700-82e4-44ca-87c7-afcc458d40d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_239c33e5-187c-4f61-af42-8d7eb6165b8e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_e28b5e81-f0af-41db-9685-49cf0d9b16b5" xlink:to="loc_us-gaap_PurchaseObligation_239c33e5-187c-4f61-af42-8d7eb6165b8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_TermOfFinancialGuarantees_d82931dc-2f6b-4fad-99f7-b2bc22688eb1" xlink:href="avnw-20250328.xsd#avnw_TermOfFinancialGuarantees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_e28b5e81-f0af-41db-9685-49cf0d9b16b5" xlink:to="loc_avnw_TermOfFinancialGuarantees_d82931dc-2f6b-4fad-99f7-b2bc22688eb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_e610b553-6f56-420c-bf40-8b69c9dc38ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_e28b5e81-f0af-41db-9685-49cf0d9b16b5" xlink:to="loc_us-gaap_OtherCommitment_e610b553-6f56-420c-bf40-8b69c9dc38ca" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/GoodwillandIntangibleAssetsScheduleofGoodwillImpairmentDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#GoodwillandIntangibleAssetsScheduleofGoodwillImpairmentDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/GoodwillandIntangibleAssetsScheduleofGoodwillImpairmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45147dac-4a3a-4a7b-ae2b-cb55bfe08834" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_21c17dae-0971-49be-8a48-c0ca02784d94" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45147dac-4a3a-4a7b-ae2b-cb55bfe08834" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_21c17dae-0971-49be-8a48-c0ca02784d94" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0ff79fe5-ab8d-4c52-9d47-fd11932ff6f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_21c17dae-0971-49be-8a48-c0ca02784d94" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0ff79fe5-ab8d-4c52-9d47-fd11932ff6f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0ff79fe5-ab8d-4c52-9d47-fd11932ff6f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0ff79fe5-ab8d-4c52-9d47-fd11932ff6f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0ff79fe5-ab8d-4c52-9d47-fd11932ff6f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_60227e7a-902d-4178-829d-5e33968d7f23" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0ff79fe5-ab8d-4c52-9d47-fd11932ff6f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_60227e7a-902d-4178-829d-5e33968d7f23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_01771f79-fdd9-4759-a29a-65e50e1750b5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_60227e7a-902d-4178-829d-5e33968d7f23" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_01771f79-fdd9-4759-a29a-65e50e1750b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PatentsMember_d1faf8b2-7576-42ee-9d87-52a50bb8fea0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PatentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_60227e7a-902d-4178-829d-5e33968d7f23" xlink:to="loc_us-gaap_PatentsMember_d1faf8b2-7576-42ee-9d87-52a50bb8fea0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_59ed4e64-d431-42c5-b76f-12192ed00a22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_60227e7a-902d-4178-829d-5e33968d7f23" xlink:to="loc_us-gaap_CustomerRelationshipsMember_59ed4e64-d431-42c5-b76f-12192ed00a22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_074b2062-7ae8-4efe-8e3d-2d04b5bdb5ea" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_60227e7a-902d-4178-829d-5e33968d7f23" xlink:to="loc_us-gaap_TradeNamesMember_074b2062-7ae8-4efe-8e3d-2d04b5bdb5ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_7afe3db5-900f-453c-a9d1-b5745e737ee2" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_21c17dae-0971-49be-8a48-c0ca02784d94" xlink:to="loc_srt_RangeAxis_7afe3db5-900f-453c-a9d1-b5745e737ee2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7afe3db5-900f-453c-a9d1-b5745e737ee2_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_7afe3db5-900f-453c-a9d1-b5745e737ee2" xlink:to="loc_srt_RangeMember_7afe3db5-900f-453c-a9d1-b5745e737ee2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1b51062a-8e08-4433-ae43-ef6e641357e6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_7afe3db5-900f-453c-a9d1-b5745e737ee2" xlink:to="loc_srt_RangeMember_1b51062a-8e08-4433-ae43-ef6e641357e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_bacd05e5-f2d9-49bc-bef9-bbc5353e3001" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1b51062a-8e08-4433-ae43-ef6e641357e6" xlink:to="loc_srt_MinimumMember_bacd05e5-f2d9-49bc-bef9-bbc5353e3001" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_442daabb-682b-4e1e-8f8b-76f89639ffc2" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1b51062a-8e08-4433-ae43-ef6e641357e6" xlink:to="loc_srt_MaximumMember_442daabb-682b-4e1e-8f8b-76f89639ffc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_86802a00-4244-4fde-94b1-b90182893ab9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45147dac-4a3a-4a7b-ae2b-cb55bfe08834" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_86802a00-4244-4fde-94b1-b90182893ab9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8979bf3e-ccd7-4cbd-991b-7bffcb4e395c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45147dac-4a3a-4a7b-ae2b-cb55bfe08834" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8979bf3e-ccd7-4cbd-991b-7bffcb4e395c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_a70d7b2d-4a3e-46f6-884d-8c76fdc4eae1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45147dac-4a3a-4a7b-ae2b-cb55bfe08834" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_a70d7b2d-4a3e-46f6-884d-8c76fdc4eae1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5d982a0d-225d-41ce-a7c4-f54ecbb310a4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_45147dac-4a3a-4a7b-ae2b-cb55bfe08834" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5d982a0d-225d-41ce-a7c4-f54ecbb310a4" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RelatedPartyTransactionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_11dc7518-559c-417d-8e73-a783ae53b6d1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4460d016-c55d-4d13-a2e2-42874eb7666a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_11dc7518-559c-417d-8e73-a783ae53b6d1" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4460d016-c55d-4d13-a2e2-42874eb7666a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_bdca10d3-5c16-4db4-9e8c-ccae0002f901" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4460d016-c55d-4d13-a2e2-42874eb7666a" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_bdca10d3-5c16-4db4-9e8c-ccae0002f901" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_bdca10d3-5c16-4db4-9e8c-ccae0002f901_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_bdca10d3-5c16-4db4-9e8c-ccae0002f901" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_bdca10d3-5c16-4db4-9e8c-ccae0002f901_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9076b77e-fe55-4b86-97f5-b5c2ba55f344" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_bdca10d3-5c16-4db4-9e8c-ccae0002f901" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9076b77e-fe55-4b86-97f5-b5c2ba55f344" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECCorporationMember_4ef0fd66-7f2c-46a0-9450-cf56eab777a6" xlink:href="avnw-20250328.xsd#avnw_NECCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9076b77e-fe55-4b86-97f5-b5c2ba55f344" xlink:to="loc_avnw_NECCorporationMember_4ef0fd66-7f2c-46a0-9450-cf56eab777a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_f74806be-b3f7-46b6-8d49-1ff62d0442ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4460d016-c55d-4d13-a2e2-42874eb7666a" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_f74806be-b3f7-46b6-8d49-1ff62d0442ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_f74806be-b3f7-46b6-8d49-1ff62d0442ae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_f74806be-b3f7-46b6-8d49-1ff62d0442ae" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_f74806be-b3f7-46b6-8d49-1ff62d0442ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_64907a84-040f-492e-8f99-6cd4cbb86a7e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_f74806be-b3f7-46b6-8d49-1ff62d0442ae" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_64907a84-040f-492e-8f99-6cd4cbb86a7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_LockUpMember_10c0fd57-8142-4a77-aa9d-81c30dca2fe2" xlink:href="avnw-20250328.xsd#avnw_LockUpMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_64907a84-040f-492e-8f99-6cd4cbb86a7e" xlink:to="loc_avnw_LockUpMember_10c0fd57-8142-4a77-aa9d-81c30dca2fe2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_bd458455-6e54-4730-8570-2a4ae2702a46" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4460d016-c55d-4d13-a2e2-42874eb7666a" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_bd458455-6e54-4730-8570-2a4ae2702a46" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_bd458455-6e54-4730-8570-2a4ae2702a46_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_bd458455-6e54-4730-8570-2a4ae2702a46" xlink:to="loc_us-gaap_RelatedPartyDomain_bd458455-6e54-4730-8570-2a4ae2702a46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_2c03f86c-7693-4601-acc8-cc04df7ae2f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_bd458455-6e54-4730-8570-2a4ae2702a46" xlink:to="loc_us-gaap_RelatedPartyDomain_2c03f86c-7693-4601-acc8-cc04df7ae2f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_94f88270-144e-483b-b907-36c70a5394b2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_2c03f86c-7693-4601-acc8-cc04df7ae2f5" xlink:to="loc_us-gaap_RelatedPartyMember_94f88270-144e-483b-b907-36c70a5394b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_fadeba14-6452-40df-bcd2-b45962aa66b1" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4460d016-c55d-4d13-a2e2-42874eb7666a" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_fadeba14-6452-40df-bcd2-b45962aa66b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_fadeba14-6452-40df-bcd2-b45962aa66b1_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_fadeba14-6452-40df-bcd2-b45962aa66b1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_fadeba14-6452-40df-bcd2-b45962aa66b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_e1e08280-b4fa-43b5-9796-c7a9d0a18127" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_fadeba14-6452-40df-bcd2-b45962aa66b1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_e1e08280-b4fa-43b5-9796-c7a9d0a18127" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECTransactionMember_6372736b-afa6-42ee-89b5-1562182730c5" xlink:href="avnw-20250328.xsd#avnw_NECTransactionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_e1e08280-b4fa-43b5-9796-c7a9d0a18127" xlink:to="loc_avnw_NECTransactionMember_6372736b-afa6-42ee-89b5-1562182730c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_d888a2bb-79c4-43b8-a3e9-09ac5dc54464" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4460d016-c55d-4d13-a2e2-42874eb7666a" xlink:to="loc_dei_LegalEntityAxis_d888a2bb-79c4-43b8-a3e9-09ac5dc54464" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d888a2bb-79c4-43b8-a3e9-09ac5dc54464_default" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_d888a2bb-79c4-43b8-a3e9-09ac5dc54464" xlink:to="loc_dei_EntityDomain_d888a2bb-79c4-43b8-a3e9-09ac5dc54464_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_87106113-a426-4274-81e8-a656c9de7329" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_d888a2bb-79c4-43b8-a3e9-09ac5dc54464" xlink:to="loc_dei_EntityDomain_87106113-a426-4274-81e8-a656c9de7329" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECCorporationMember_7baf4ce5-ef23-476a-b958-dd9ad406c38c" xlink:href="avnw-20250328.xsd#avnw_NECCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_87106113-a426-4274-81e8-a656c9de7329" xlink:to="loc_avnw_NECCorporationMember_7baf4ce5-ef23-476a-b958-dd9ad406c38c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_b9179d02-95ef-4f5d-96c0-05f10d1c742d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_11dc7518-559c-417d-8e73-a783ae53b6d1" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_b9179d02-95ef-4f5d-96c0-05f10d1c742d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ShareReleaseMonthlyReleaseOfIssuedShares_97ee3886-d0d7-4f53-97c6-8c379cd93a7b" xlink:href="avnw-20250328.xsd#avnw_ShareReleaseMonthlyReleaseOfIssuedShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_11dc7518-559c-417d-8e73-a783ae53b6d1" xlink:to="loc_avnw_ShareReleaseMonthlyReleaseOfIssuedShares_97ee3886-d0d7-4f53-97c6-8c379cd93a7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ShareReleasePeriodAfterClosingDate_32b98542-051a-4cec-824d-7bbdd4d4d1a0" xlink:href="avnw-20250328.xsd#avnw_ShareReleasePeriodAfterClosingDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_11dc7518-559c-417d-8e73-a783ae53b6d1" xlink:to="loc_avnw_ShareReleasePeriodAfterClosingDate_32b98542-051a-4cec-824d-7bbdd4d4d1a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_00bce206-0e01-40e5-b570-c21a94378136" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_11dc7518-559c-417d-8e73-a783ae53b6d1" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_00bce206-0e01-40e5-b570-c21a94378136" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_5a23ad9e-46a2-4ce4-924e-41c80fde5142" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4b016b4e-26b6-49e6-b66b-f25bb5a9112e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5a23ad9e-46a2-4ce4-924e-41c80fde5142" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4b016b4e-26b6-49e6-b66b-f25bb5a9112e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_3a064ae4-0a14-41af-969b-8e49582599e5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4b016b4e-26b6-49e6-b66b-f25bb5a9112e" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_3a064ae4-0a14-41af-969b-8e49582599e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3a064ae4-0a14-41af-969b-8e49582599e5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_3a064ae4-0a14-41af-969b-8e49582599e5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3a064ae4-0a14-41af-969b-8e49582599e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e3b23b0e-c767-441e-98fd-a1c71a601553" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_3a064ae4-0a14-41af-969b-8e49582599e5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e3b23b0e-c767-441e-98fd-a1c71a601553" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECCorporationMember_73c9b3a4-4763-4f85-96af-0e4918e3fe20" xlink:href="avnw-20250328.xsd#avnw_NECCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e3b23b0e-c767-441e-98fd-a1c71a601553" xlink:to="loc_avnw_NECCorporationMember_73c9b3a4-4763-4f85-96af-0e4918e3fe20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_50d45cf7-98b6-4fb0-8428-2f535b988cca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4b016b4e-26b6-49e6-b66b-f25bb5a9112e" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_50d45cf7-98b6-4fb0-8428-2f535b988cca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_50d45cf7-98b6-4fb0-8428-2f535b988cca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_50d45cf7-98b6-4fb0-8428-2f535b988cca" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_50d45cf7-98b6-4fb0-8428-2f535b988cca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_638bb896-11f8-4b32-9f1b-ab816cf5cc76" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_50d45cf7-98b6-4fb0-8428-2f535b988cca" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_638bb896-11f8-4b32-9f1b-ab816cf5cc76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_TransitionServicesMember_ca525790-6ca9-4d8f-820c-a6c659da93e7" xlink:href="avnw-20250328.xsd#avnw_TransitionServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_638bb896-11f8-4b32-9f1b-ab816cf5cc76" xlink:to="loc_avnw_TransitionServicesMember_ca525790-6ca9-4d8f-820c-a6c659da93e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ResearchAndDevelopmentServicesMember_176f9000-d027-4b73-9538-938a4ca74d45" xlink:href="avnw-20250328.xsd#avnw_ResearchAndDevelopmentServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_638bb896-11f8-4b32-9f1b-ab816cf5cc76" xlink:to="loc_avnw_ResearchAndDevelopmentServicesMember_176f9000-d027-4b73-9538-938a4ca74d45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoriesMember_06c1ea9b-62eb-41da-862a-c05a44e651fc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_638bb896-11f8-4b32-9f1b-ab816cf5cc76" xlink:to="loc_us-gaap_InventoriesMember_06c1ea9b-62eb-41da-862a-c05a44e651fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_c0e88b2b-e470-4b8b-8c81-3136fffcd0d6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5a23ad9e-46a2-4ce4-924e-41c80fde5142" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_c0e88b2b-e470-4b8b-8c81-3136fffcd0d6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsBalanceSheetsDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RelatedPartyTransactionsScheduleofRelatedPartyTransactionsBalanceSheetsDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RelatedPartyTransactionsScheduleofRelatedPartyTransactionsBalanceSheetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_54c0839d-70f3-4de0-ac99-f7c904cc9332" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8d13baa0-a9ec-4a73-930e-269085d9b43c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_54c0839d-70f3-4de0-ac99-f7c904cc9332" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8d13baa0-a9ec-4a73-930e-269085d9b43c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_3c7bfcea-fdbf-4d8e-a7fa-c3c641933ed6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8d13baa0-a9ec-4a73-930e-269085d9b43c" xlink:to="loc_srt_CounterpartyNameAxis_3c7bfcea-fdbf-4d8e-a7fa-c3c641933ed6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3c7bfcea-fdbf-4d8e-a7fa-c3c641933ed6_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_3c7bfcea-fdbf-4d8e-a7fa-c3c641933ed6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3c7bfcea-fdbf-4d8e-a7fa-c3c641933ed6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9d67f3bb-33ac-4118-9835-762542641109" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_3c7bfcea-fdbf-4d8e-a7fa-c3c641933ed6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9d67f3bb-33ac-4118-9835-762542641109" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_NECCorporationMember_3fdbc8e7-1f0c-4981-a4f6-7fc3d6b99258" xlink:href="avnw-20250328.xsd#avnw_NECCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9d67f3bb-33ac-4118-9835-762542641109" xlink:to="loc_avnw_NECCorporationMember_3fdbc8e7-1f0c-4981-a4f6-7fc3d6b99258" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_989ac323-ce14-4fe2-82a4-463608722438" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_8d13baa0-a9ec-4a73-930e-269085d9b43c" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_989ac323-ce14-4fe2-82a4-463608722438" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_989ac323-ce14-4fe2-82a4-463608722438_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_989ac323-ce14-4fe2-82a4-463608722438" xlink:to="loc_us-gaap_RelatedPartyDomain_989ac323-ce14-4fe2-82a4-463608722438_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_171badb7-5cee-4d82-9f75-1141c02787e1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_989ac323-ce14-4fe2-82a4-463608722438" xlink:to="loc_us-gaap_RelatedPartyDomain_171badb7-5cee-4d82-9f75-1141c02787e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_aeab6cbd-2d61-4bbd-a961-f05292bd1169" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_171badb7-5cee-4d82-9f75-1141c02787e1" xlink:to="loc_us-gaap_RelatedPartyMember_aeab6cbd-2d61-4bbd-a961-f05292bd1169" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_8d15927c-552d-4e54-8c77-c5a090a9e64b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_54c0839d-70f3-4de0-ac99-f7c904cc9332" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_8d15927c-552d-4e54-8c77-c5a090a9e64b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_8d7b77e8-c860-42de-ad00-da6ad26dd9ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_54c0839d-70f3-4de0-ac99-f7c904cc9332" xlink:to="loc_us-gaap_AccountsPayableCurrent_8d7b77e8-c860-42de-ad00-da6ad26dd9ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_e86def64-fcc9-4d50-81aa-9205d07a626a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_54c0839d-70f3-4de0-ac99-f7c904cc9332" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_e86def64-fcc9-4d50-81aa-9205d07a626a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSunauditedDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSunauditedDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSunauditedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_7b953df2-db00-4713-83fe-164ccb7c549a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_7b953df2-db00-4713-83fe-164ccb7c549a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_570ee053-9a01-43c7-98ad-699259b760c0" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_7b953df2-db00-4713-83fe-164ccb7c549a" xlink:to="loc_srt_ProductOrServiceAxis_570ee053-9a01-43c7-98ad-699259b760c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_570ee053-9a01-43c7-98ad-699259b760c0_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_570ee053-9a01-43c7-98ad-699259b760c0" xlink:to="loc_srt_ProductsAndServicesDomain_570ee053-9a01-43c7-98ad-699259b760c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_79ebff75-6c1d-42b6-af1e-002291a6ca17" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_570ee053-9a01-43c7-98ad-699259b760c0" xlink:to="loc_srt_ProductsAndServicesDomain_79ebff75-6c1d-42b6-af1e-002291a6ca17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_117b572d-0570-4999-be83-140f6fd785b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_79ebff75-6c1d-42b6-af1e-002291a6ca17" xlink:to="loc_us-gaap_ProductMember_117b572d-0570-4999-be83-140f6fd785b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServiceMember_93ca4b40-e146-468b-bf6a-e651b2fb08e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_79ebff75-6c1d-42b6-af1e-002291a6ca17" xlink:to="loc_us-gaap_ServiceMember_93ca4b40-e146-468b-bf6a-e651b2fb08e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_bc230df5-cca0-4313-888d-e2d72c928e2b" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_7b953df2-db00-4713-83fe-164ccb7c549a" xlink:to="loc_srt_RestatementAxis_bc230df5-cca0-4313-888d-e2d72c928e2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_bc230df5-cca0-4313-888d-e2d72c928e2b_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_bc230df5-cca0-4313-888d-e2d72c928e2b" xlink:to="loc_srt_RestatementDomain_bc230df5-cca0-4313-888d-e2d72c928e2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_b8267da1-2641-42c9-8572-73783edcd56e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_bc230df5-cca0-4313-888d-e2d72c928e2b" xlink:to="loc_srt_RestatementDomain_b8267da1-2641-42c9-8572-73783edcd56e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_fb7e8f1f-96ba-4667-a3fe-56f5f5880506" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_b8267da1-2641-42c9-8572-73783edcd56e" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_fb7e8f1f-96ba-4667-a3fe-56f5f5880506" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_99410cdd-8305-4067-94b4-b6439c822ca1" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_b8267da1-2641-42c9-8572-73783edcd56e" xlink:to="loc_srt_RestatementAdjustmentMember_99410cdd-8305-4067-94b4-b6439c822ca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_e770f475-010e-4663-80b9-af3c5849fb75" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_RevenuesAbstract_e770f475-010e-4663-80b9-af3c5849fb75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_80c772ca-84a9-4fec-abcf-d37bac0083f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_e770f475-010e-4663-80b9-af3c5849fb75" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_80c772ca-84a9-4fec-abcf-d37bac0083f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_43ee750f-326a-4bfb-83b6-de79f645b01c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_43ee750f-326a-4bfb-83b6-de79f645b01c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_d2987a4e-68ab-4db1-b163-57df473074ec" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSoldAbstract_43ee750f-326a-4bfb-83b6-de79f645b01c" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_d2987a4e-68ab-4db1-b163-57df473074ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_d2b42418-c894-432d-911a-8e5fd6a3d550" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_GrossProfit_d2b42418-c894-432d-911a-8e5fd6a3d550" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_c274a025-c8ae-4727-8200-4ce2fd3da3af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_c274a025-c8ae-4727-8200-4ce2fd3da3af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_d595a2c6-cb43-4776-a302-25663b889b88" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_OperatingIncomeLoss_d595a2c6-cb43-4776-a302-25663b889b88" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_01ba188c-a810-4c6b-8807-55faab3a7c20" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_01ba188c-a810-4c6b-8807-55faab3a7c20" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_5fd81d1b-6507-4bdc-aa2c-b05bc254ce15" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_5fd81d1b-6507-4bdc-aa2c-b05bc254ce15" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_5f53a351-c98e-47f0-83cc-f06458f9c7ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_5f53a351-c98e-47f0-83cc-f06458f9c7ae" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_29039246-376f-4995-907b-acf3f993ad94" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_29039246-376f-4995-907b-acf3f993ad94" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_9f282c33-74ed-4a7e-b224-742215f36802" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_15a4e146-90e0-4343-a121-150f6dc93796" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_9f282c33-74ed-4a7e-b224-742215f36802" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_efa746aa-5b53-4009-8889-3d7bfca6b22e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_9f282c33-74ed-4a7e-b224-742215f36802" xlink:to="loc_us-gaap_EarningsPerShareBasic_efa746aa-5b53-4009-8889-3d7bfca6b22e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_cad14773-03e9-4851-90c2-15560f5bc13c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_9f282c33-74ed-4a7e-b224-742215f36802" xlink:to="loc_us-gaap_EarningsPerShareDiluted_cad14773-03e9-4851-90c2-15560f5bc13c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEunauditedDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEunauditedDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEunauditedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_66a3692b-2c4a-4bbe-9a92-60c242d5444a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_45680a5f-464c-44f2-8d03-003fc5533dae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_66a3692b-2c4a-4bbe-9a92-60c242d5444a" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_45680a5f-464c-44f2-8d03-003fc5533dae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_51ded5fa-ae5d-4a0a-a069-9abad14dec08" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_45680a5f-464c-44f2-8d03-003fc5533dae" xlink:to="loc_srt_RestatementAxis_51ded5fa-ae5d-4a0a-a069-9abad14dec08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_51ded5fa-ae5d-4a0a-a069-9abad14dec08_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_51ded5fa-ae5d-4a0a-a069-9abad14dec08" xlink:to="loc_srt_RestatementDomain_51ded5fa-ae5d-4a0a-a069-9abad14dec08_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_5f34b6f6-1647-40cc-b5c1-ff6ceb1b8361" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_51ded5fa-ae5d-4a0a-a069-9abad14dec08" xlink:to="loc_srt_RestatementDomain_5f34b6f6-1647-40cc-b5c1-ff6ceb1b8361" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_a93cef76-170f-41db-8747-afbd475982f6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_5f34b6f6-1647-40cc-b5c1-ff6ceb1b8361" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_a93cef76-170f-41db-8747-afbd475982f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_2c4662f6-0539-4fcd-b620-939bd94cdd43" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_5f34b6f6-1647-40cc-b5c1-ff6ceb1b8361" xlink:to="loc_srt_RestatementAdjustmentMember_2c4662f6-0539-4fcd-b620-939bd94cdd43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5e16b4e3-d542-465c-aab4-723f79cdd0ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_66a3692b-2c4a-4bbe-9a92-60c242d5444a" xlink:to="loc_us-gaap_NetIncomeLoss_5e16b4e3-d542-465c-aab4-723f79cdd0ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84a91395-1afd-4eaf-979b-90bc6bf86c4b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_66a3692b-2c4a-4bbe-9a92-60c242d5444a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84a91395-1afd-4eaf-979b-90bc6bf86c4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_95e1f9eb-8cc3-4aad-8193-1d8784849ce2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84a91395-1afd-4eaf-979b-90bc6bf86c4b" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_95e1f9eb-8cc3-4aad-8193-1d8784849ce2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSunauditedDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSunauditedDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSunauditedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_ef180515-d75a-4d61-959d-4e30a0a63e84" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_30915b70-38df-480a-ab3f-e2bc9dfbddcb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_ef180515-d75a-4d61-959d-4e30a0a63e84" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_30915b70-38df-480a-ab3f-e2bc9dfbddcb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_662b0886-9009-4c54-9a89-ec982be31bd7" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_30915b70-38df-480a-ab3f-e2bc9dfbddcb" xlink:to="loc_srt_RestatementAxis_662b0886-9009-4c54-9a89-ec982be31bd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_662b0886-9009-4c54-9a89-ec982be31bd7_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_662b0886-9009-4c54-9a89-ec982be31bd7" xlink:to="loc_srt_RestatementDomain_662b0886-9009-4c54-9a89-ec982be31bd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_5202e23c-1812-4911-8c5e-9643fee67a84" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_662b0886-9009-4c54-9a89-ec982be31bd7" xlink:to="loc_srt_RestatementDomain_5202e23c-1812-4911-8c5e-9643fee67a84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_77639cbc-1ad9-478e-ad51-eea207a0bfed" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_5202e23c-1812-4911-8c5e-9643fee67a84" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_77639cbc-1ad9-478e-ad51-eea207a0bfed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_8a25c755-9a4d-4636-8e15-40195597b5d5" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_5202e23c-1812-4911-8c5e-9643fee67a84" xlink:to="loc_srt_RestatementAdjustmentMember_8a25c755-9a4d-4636-8e15-40195597b5d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_3b26ea08-307e-408d-b513-d81de0df10c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_ef180515-d75a-4d61-959d-4e30a0a63e84" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_3b26ea08-307e-408d-b513-d81de0df10c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_75e22942-f968-43d6-b60f-7f265c2b3c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_3b26ea08-307e-408d-b513-d81de0df10c3" xlink:to="loc_us-gaap_NetIncomeLoss_75e22942-f968-43d6-b60f-7f265c2b3c9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_d3e6319a-9a64-49dd-9bb7-b5887638cc1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_3b26ea08-307e-408d-b513-d81de0df10c3" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_d3e6319a-9a64-49dd-9bb7-b5887638cc1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_6d05a34c-f6af-45dc-8e96-e489c2378fb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_d3e6319a-9a64-49dd-9bb7-b5887638cc1b" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_6d05a34c-f6af-45dc-8e96-e489c2378fb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_b4e806d1-3788-4474-8f7e-8430a852e983" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_d3e6319a-9a64-49dd-9bb7-b5887638cc1b" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_b4e806d1-3788-4474-8f7e-8430a852e983" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerAsset_f6a8229e-3c26-4d41-899f-589493bbfd24" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_d3e6319a-9a64-49dd-9bb7-b5887638cc1b" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerAsset_f6a8229e-3c26-4d41-899f-589493bbfd24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_d68a2f9e-443c-404f-b425-f42c17e5f9c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_d3e6319a-9a64-49dd-9bb7-b5887638cc1b" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_d68a2f9e-443c-404f-b425-f42c17e5f9c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_3226767b-b13d-48c9-9180-cc4ff5a7d220" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_d3e6319a-9a64-49dd-9bb7-b5887638cc1b" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_3226767b-b13d-48c9-9180-cc4ff5a7d220" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b80c98c9-a9ee-4c67-a7b9-4c799c691e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_3b26ea08-307e-408d-b513-d81de0df10c3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b80c98c9-a9ee-4c67-a7b9-4c799c691e5a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYunauditedDetails" xlink:type="simple" xlink:href="avnw-20250328.xsd#RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYunauditedDetails"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RevisionstoPriorPeriodConsolidatedFinancialStatementsCONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYunauditedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_aeb952fc-d36e-483b-a25e-3c51a1b7f898" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_ec0d790d-e13c-4b7c-9ff9-6ab643b44b7b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_aeb952fc-d36e-483b-a25e-3c51a1b7f898" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_ec0d790d-e13c-4b7c-9ff9-6ab643b44b7b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_32828e0f-f1c6-4236-b076-d54136cf7f31" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_ec0d790d-e13c-4b7c-9ff9-6ab643b44b7b" xlink:to="loc_srt_RestatementAxis_32828e0f-f1c6-4236-b076-d54136cf7f31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_32828e0f-f1c6-4236-b076-d54136cf7f31_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_32828e0f-f1c6-4236-b076-d54136cf7f31" xlink:to="loc_srt_RestatementDomain_32828e0f-f1c6-4236-b076-d54136cf7f31_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_c17e9d7e-e460-4a71-9a62-a89e4a95f398" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_32828e0f-f1c6-4236-b076-d54136cf7f31" xlink:to="loc_srt_RestatementDomain_c17e9d7e-e460-4a71-9a62-a89e4a95f398" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_d6d9e30c-ff32-4242-bd53-f02c0e2b01db" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_c17e9d7e-e460-4a71-9a62-a89e4a95f398" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_d6d9e30c-ff32-4242-bd53-f02c0e2b01db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_0a77daf6-5289-4c60-b311-50ad4277168d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_c17e9d7e-e460-4a71-9a62-a89e4a95f398" xlink:to="loc_srt_RestatementAdjustmentMember_0a77daf6-5289-4c60-b311-50ad4277168d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_a43dabcd-5161-4496-92a8-bfc3be1b3d86" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_ec0d790d-e13c-4b7c-9ff9-6ab643b44b7b" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_a43dabcd-5161-4496-92a8-bfc3be1b3d86" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a43dabcd-5161-4496-92a8-bfc3be1b3d86_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_a43dabcd-5161-4496-92a8-bfc3be1b3d86" xlink:to="loc_us-gaap_EquityComponentDomain_a43dabcd-5161-4496-92a8-bfc3be1b3d86_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_cf8cf4c0-30a9-4d06-84c1-c64d5eff0432" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_a43dabcd-5161-4496-92a8-bfc3be1b3d86" xlink:to="loc_us-gaap_EquityComponentDomain_cf8cf4c0-30a9-4d06-84c1-c64d5eff0432" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_d0f5c521-663d-4681-a7b8-d3bb142ffc5d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_cf8cf4c0-30a9-4d06-84c1-c64d5eff0432" xlink:to="loc_us-gaap_RetainedEarningsMember_d0f5c521-663d-4681-a7b8-d3bb142ffc5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ChangeInStockholdersEquityRollForward_3b6e884f-0c21-4d98-ac17-f2f8f93ce190" xlink:href="avnw-20250328.xsd#avnw_ChangeInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_aeb952fc-d36e-483b-a25e-3c51a1b7f898" xlink:to="loc_avnw_ChangeInStockholdersEquityRollForward_3b6e884f-0c21-4d98-ac17-f2f8f93ce190" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_0e7e1399-ea68-4544-9a9b-fc1068439306" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_avnw_ChangeInStockholdersEquityRollForward_3b6e884f-0c21-4d98-ac17-f2f8f93ce190" xlink:to="loc_us-gaap_StockholdersEquity_0e7e1399-ea68-4544-9a9b-fc1068439306" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_9713331b-20cb-4e55-8344-3581c1b5d98f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_avnw_ChangeInStockholdersEquityRollForward_3b6e884f-0c21-4d98-ac17-f2f8f93ce190" xlink:to="loc_us-gaap_NetIncomeLoss_9713331b-20cb-4e55-8344-3581c1b5d98f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_7f04a720-120d-4adc-bcc2-691530727ff7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_avnw_ErinBoaseMember_dc60d771-4130-44c5-a002-96fce80cf7dc" xlink:href="avnw-20250328.xsd#avnw_ErinBoaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_avnw_ErinBoaseMember_dc60d771-4130-44c5-a002-96fce80cf7dc" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
