<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponents" xlink:href="avnw-20171229.xsd#BalanceSheetComponents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedExpensesDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsAccruedExpensesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedWarrantiesDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsAccruedWarrantiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAdvancedPaymentsAndUnearnedIncomeDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsAdvancedPaymentsAndUnearnedIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsCashCashEquivalentsAndRestrictedCashDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsCashCashEquivalentsAndRestrictedCashDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoriesDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsInventoriesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoryAdjustmentsDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsInventoryAdjustmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsPropertyPlantAndEquipmentDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsPropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsReceivablesDetails" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsReceivablesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsTables" xlink:href="avnw-20171229.xsd#BalanceSheetComponentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsAndContingencies" xlink:href="avnw-20171229.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesFutureMinimumLeasePaymentsDetails" xlink:href="avnw-20171229.xsd#CommitmentsAndContingenciesFutureMinimumLeasePaymentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:href="avnw-20171229.xsd#CommitmentsAndContingenciesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesRentalExpenseForOperatingLeasesDetails" xlink:href="avnw-20171229.xsd#CommitmentsAndContingenciesRentalExpenseForOperatingLeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesTables" xlink:href="avnw-20171229.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CompanyAndBasisOfPresentation" xlink:href="avnw-20171229.xsd#CompanyAndBasisOfPresentation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CompanyAndBasisOfPresentationDetails" xlink:href="avnw-20171229.xsd#CompanyAndBasisOfPresentationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CompanyAndBasisOfPresentationPolicies" xlink:href="avnw-20171229.xsd#CompanyAndBasisOfPresentationPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:href="avnw-20171229.xsd#CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:href="avnw-20171229.xsd#CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:href="avnw-20171229.xsd#CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CondensedConsolidatedStatementsOfComprehensiveLossUnaudited" xlink:href="avnw-20171229.xsd#CondensedConsolidatedStatementsOfComprehensiveLossUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CondensedConsolidatedStatementsOfOperationsUnaudited" xlink:href="avnw-20171229.xsd#CondensedConsolidatedStatementsOfOperationsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CreditFacilityAndDebt" xlink:href="avnw-20171229.xsd#CreditFacilityAndDebt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/CreditFacilityAndDebtDetails" xlink:href="avnw-20171229.xsd#CreditFacilityAndDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/DocumentAndEntityInformation" xlink:href="avnw-20171229.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilities" xlink:href="avnw-20171229.xsd#FairValueMeasurementsOfAssetsAndLiabilities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesDetails" xlink:href="avnw-20171229.xsd#FairValueMeasurementsOfAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesTables" xlink:href="avnw-20171229.xsd#FairValueMeasurementsOfAssetsAndLiabilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxes" xlink:href="avnw-20171229.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/IncomeTaxesNarrativeDetails" xlink:href="avnw-20171229.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomePerShareOfCommonStock" xlink:href="avnw-20171229.xsd#NetIncomePerShareOfCommonStock" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomePerShareOfCommonStockDetails" xlink:href="avnw-20171229.xsd#NetIncomePerShareOfCommonStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/NetIncomePerShareOfCommonStockTables" xlink:href="avnw-20171229.xsd#NetIncomePerShareOfCommonStockTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RestructuringActivities" xlink:href="avnw-20171229.xsd#RestructuringActivities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RestructuringActivitiesRestructuringLiabilityDetails" xlink:href="avnw-20171229.xsd#RestructuringActivitiesRestructuringLiabilityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/RestructuringActivitiesTables" xlink:href="avnw-20171229.xsd#RestructuringActivitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentAndGeographicInformation" xlink:href="avnw-20171229.xsd#SegmentAndGeographicInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentAndGeographicInformationScheduleOfRevenuesByGeographicRegionDetails" xlink:href="avnw-20171229.xsd#SegmentAndGeographicInformationScheduleOfRevenuesByGeographicRegionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/SegmentAndGeographicInformationTables" xlink:href="avnw-20171229.xsd#SegmentAndGeographicInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquity" xlink:href="avnw-20171229.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityNarrativeDetails" xlink:href="avnw-20171229.xsd#StockholdersEquityNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityStockBasedCompensationExpenseDetails" xlink:href="avnw-20171229.xsd#StockholdersEquityStockBasedCompensationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/StockholdersEquityTables" xlink:href="avnw-20171229.xsd#StockholdersEquityTables" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponents" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedExpensesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAccruedWarrantiesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsAdvancedPaymentsAndUnearnedIncomeDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsCashCashEquivalentsAndRestrictedCashDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoriesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsInventoryAdjustmentsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsPropertyPlantAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8F604A37E1565331AA3FC30411C9647F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_2BB21837232558089D0708CBAA69FDEA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8F604A37E1565331AA3FC30411C9647F" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_2BB21837232558089D0708CBAA69FDEA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9203EE4F13655FF3BABA6191E54CFCF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_2BB21837232558089D0708CBAA69FDEA" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9203EE4F13655FF3BABA6191E54CFCF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2A96A1DEA4C3F81C476183C698D1454D_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9203EE4F13655FF3BABA6191E54CFCF1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2A96A1DEA4C3F81C476183C698D1454D_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E9FC653FF24252D3AD6C6E5385F887D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_9203EE4F13655FF3BABA6191E54CFCF1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E9FC653FF24252D3AD6C6E5385F887D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LandMember" xlink:label="loc_us-gaap_LandMember_56A528FDA22A5C7DB25AB1273211ACF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E9FC653FF24252D3AD6C6E5385F887D7" xlink:to="loc_us-gaap_LandMember_56A528FDA22A5C7DB25AB1273211ACF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_4564903A08EF5982A5F430DC7B79CFFE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E9FC653FF24252D3AD6C6E5385F887D7" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_4564903A08EF5982A5F430DC7B79CFFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SoftwareDevelopmentMember" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_0D114A9DEB135060A25E7356B3727AAF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E9FC653FF24252D3AD6C6E5385F887D7" xlink:to="loc_us-gaap_SoftwareDevelopmentMember_0D114A9DEB135060A25E7356B3727AAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_D4100294369A5180A6007A8667FF4E9C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_E9FC653FF24252D3AD6C6E5385F887D7" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_D4100294369A5180A6007A8667FF4E9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_0519102F538F5F30A4BF451AA134EF2D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8F604A37E1565331AA3FC30411C9647F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_0519102F538F5F30A4BF451AA134EF2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_FFE846B1788D5A6884BC334C780FC967" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8F604A37E1565331AA3FC30411C9647F" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_FFE846B1788D5A6884BC334C780FC967" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_677133437CEF57488ACE22A8F7B31795" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8F604A37E1565331AA3FC30411C9647F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_677133437CEF57488ACE22A8F7B31795" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsReceivablesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/BalanceSheetComponentsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesFutureMinimumLeasePaymentsDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_C934706372B053CE897D485B816266C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:to="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_C934706372B053CE897D485B816266C2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_8865C994CC49508D865E9266B6E9ED58" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_C934706372B053CE897D485B816266C2" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_8865C994CC49508D865E9266B6E9ED58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_491F50177E2C2395930B3BD6079F3FA6_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_8865C994CC49508D865E9266B6E9ED58" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_491F50177E2C2395930B3BD6079F3FA6_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_FA2A23C2A2B353029A594ECA9CF86736" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_8865C994CC49508D865E9266B6E9ED58" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_FA2A23C2A2B353029A594ECA9CF86736" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoriesMember" xlink:label="loc_us-gaap_InventoriesMember_8A1464FCA6285FC6893E524AFB941F9F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_FA2A23C2A2B353029A594ECA9CF86736" xlink:to="loc_us-gaap_InventoriesMember_8A1464FCA6285FC6893E524AFB941F9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="loc_us-gaap_LicensingAgreementsMember_CBCC19DD9F1650698A91EE2EC7D8D5D4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_FA2A23C2A2B353029A594ECA9CF86736" xlink:to="loc_us-gaap_LicensingAgreementsMember_CBCC19DD9F1650698A91EE2EC7D8D5D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_C60447941EF05EC6B0F668E28EE79C96" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_C934706372B053CE897D485B816266C2" xlink:to="loc_us-gaap_StatementGeographicalAxis_C60447941EF05EC6B0F668E28EE79C96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_53C455319342C4702B313BC465E5CE16_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_C60447941EF05EC6B0F668E28EE79C96" xlink:to="loc_us-gaap_SegmentGeographicalDomain_53C455319342C4702B313BC465E5CE16_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_F2D8F1DD76AA51CE9E90D055D191EB70" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_C60447941EF05EC6B0F668E28EE79C96" xlink:to="loc_us-gaap_SegmentGeographicalDomain_F2D8F1DD76AA51CE9E90D055D191EB70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_AU" xlink:label="loc_country_AU_37A60C13C2655627B0115CEA3CD0BEEA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_F2D8F1DD76AA51CE9E90D055D191EB70" xlink:to="loc_country_AU_37A60C13C2655627B0115CEA3CD0BEEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_4723A51FB71B57F99B7388640204DB0A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_C934706372B053CE897D485B816266C2" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_4723A51FB71B57F99B7388640204DB0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0669A7C5E4312732CA303BC465E5E595_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_4723A51FB71B57F99B7388640204DB0A" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_0669A7C5E4312732CA303BC465E5E595_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain" xlink:label="loc_us-gaap_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_C715AC032BB151F2A19E2F49531245D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_4723A51FB71B57F99B7388640204DB0A" xlink:to="loc_us-gaap_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_C715AC032BB151F2A19E2F49531245D0" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_OfficebuildingatMilpitasCaliforniaMember" xlink:label="loc_avnw_OfficebuildingatMilpitasCaliforniaMember_4B9BA8740E425E549FD22AF122EC3494" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_C715AC032BB151F2A19E2F49531245D0" xlink:to="loc_avnw_OfficebuildingatMilpitasCaliforniaMember_4B9BA8740E425E549FD22AF122EC3494" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_28297FFE3D3D584DAF182438FED0DF10" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseByMajorPropertyClassTable_C934706372B053CE897D485B816266C2" xlink:to="loc_us-gaap_RangeAxis_28297FFE3D3D584DAF182438FED0DF10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_55C46DD07F44B2B70ED03BC465E5DAD5_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_28297FFE3D3D584DAF182438FED0DF10" xlink:to="loc_us-gaap_RangeMember_55C46DD07F44B2B70ED03BC465E5DAD5_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_404A720A9C85563F86875591F9CB331C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_28297FFE3D3D584DAF182438FED0DF10" xlink:to="loc_us-gaap_RangeMember_404A720A9C85563F86875591F9CB331C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_F51A95AD083350D0A9E7A45B0035758B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_404A720A9C85563F86875591F9CB331C" xlink:to="loc_us-gaap_MaximumMember_F51A95AD083350D0A9E7A45B0035758B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AreaOfRealEstateProperty" xlink:label="loc_us-gaap_AreaOfRealEstateProperty_0A0437440F705B64A36DCAA3C55EDE03" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:to="loc_us-gaap_AreaOfRealEstateProperty_0A0437440F705B64A36DCAA3C55EDE03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_DC77A44D5CE25B53B346E15E782CD430" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_DC77A44D5CE25B53B346E15E782CD430" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentAmount" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentAmount_E7E1D3A90B1B59CB97340A731633EDDA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentAmount_E7E1D3A90B1B59CB97340A731633EDDA" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_TermofFinancialGuarantees" xlink:label="loc_avnw_TermofFinancialGuarantees_44AF888A472253F092C10213DEE9A87E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:to="loc_avnw_TermofFinancialGuarantees_44AF888A472253F092C10213DEE9A87E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCommitment" xlink:label="loc_us-gaap_OtherCommitment_FFFEF2C08E355CD6BCC68FBCF8FAD827" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:to="loc_us-gaap_OtherCommitment_FFFEF2C08E355CD6BCC68FBCF8FAD827" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyDamagesSoughtValue" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_7F370CC85EB251B4B7FF1576F38300FA" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseLineItems_82EFA2B7D8615E9185E3B54049B72264" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_7F370CC85EB251B4B7FF1576F38300FA" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesRentalExpenseForOperatingLeasesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CommitmentsAndContingenciesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CompanyAndBasisOfPresentation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CompanyAndBasisOfPresentationDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CompanyAndBasisOfPresentationPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CondensedConsolidatedStatementsOfComprehensiveLossUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CondensedConsolidatedStatementsOfOperationsUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CreditFacilityAndDebt" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/CreditFacilityAndDebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_206F4EAF5D9F55038503F1CF0FDC19EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_206F4EAF5D9F55038503F1CF0FDC19EA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_67D220D588A45A5A8E1854D72F5BD4DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_206F4EAF5D9F55038503F1CF0FDC19EA" xlink:to="loc_us-gaap_StatementGeographicalAxis_67D220D588A45A5A8E1854D72F5BD4DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_0EB1FE6D092D6E4B1A7483B2E25CDE0E_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_67D220D588A45A5A8E1854D72F5BD4DD" xlink:to="loc_us-gaap_SegmentGeographicalDomain_0EB1FE6D092D6E4B1A7483B2E25CDE0E_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_D2D611D20A6D514F8422712E3B5DADEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_67D220D588A45A5A8E1854D72F5BD4DD" xlink:to="loc_us-gaap_SegmentGeographicalDomain_D2D611D20A6D514F8422712E3B5DADEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_NZ" xlink:label="loc_country_NZ_61FDB081979655EA89A3F2426427E1F3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_D2D611D20A6D514F8422712E3B5DADEF" xlink:to="loc_country_NZ_61FDB081979655EA89A3F2426427E1F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_B4846F889678555A8FEC8AEF4C6AF590" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_206F4EAF5D9F55038503F1CF0FDC19EA" xlink:to="loc_us-gaap_CreditFacilityAxis_B4846F889678555A8FEC8AEF4C6AF590" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_8BEB18E0E0B1F7163AEF83B2E25C0723_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_B4846F889678555A8FEC8AEF4C6AF590" xlink:to="loc_us-gaap_CreditFacilityDomain_8BEB18E0E0B1F7163AEF83B2E25C0723_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_EFBA20A31D1B5DD2B79493BD59D5F312" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_B4846F889678555A8FEC8AEF4C6AF590" xlink:to="loc_us-gaap_CreditFacilityDomain_EFBA20A31D1B5DD2B79493BD59D5F312" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_DD8A2145942C56DAADB6BF1A2C117AD6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_EFBA20A31D1B5DD2B79493BD59D5F312" xlink:to="loc_us-gaap_LineOfCreditMember_DD8A2145942C56DAADB6BF1A2C117AD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_9C8E1671F89259E1929A3B8C1095D10E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_EFBA20A31D1B5DD2B79493BD59D5F312" xlink:to="loc_us-gaap_LetterOfCreditMember_9C8E1671F89259E1929A3B8C1095D10E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignLineOfCreditMember" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_DFD1F3AB3BA35BA9A8B61EAACD08D7D4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_EFBA20A31D1B5DD2B79493BD59D5F312" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_DFD1F3AB3BA35BA9A8B61EAACD08D7D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_C39199827E6750218E07D4E95216F208" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_EFBA20A31D1B5DD2B79493BD59D5F312" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_C39199827E6750218E07D4E95216F208" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_E7AEEADF47195F7AA334BF1149D9B986" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_EFBA20A31D1B5DD2B79493BD59D5F312" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_E7AEEADF47195F7AA334BF1149D9B986" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_4530071E560E5EE9BDBC4EFEAFD811C4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_206F4EAF5D9F55038503F1CF0FDC19EA" xlink:to="loc_us-gaap_DebtInstrumentAxis_4530071E560E5EE9BDBC4EFEAFD811C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_B2F5D60AFF5D7B9051EA83B2E25DB913_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4530071E560E5EE9BDBC4EFEAFD811C4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_B2F5D60AFF5D7B9051EA83B2E25DB913_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_481CFC6B7D145750B497E56EA91C61A5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4530071E560E5EE9BDBC4EFEAFD811C4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_481CFC6B7D145750B497E56EA91C61A5" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_SiliconValleyBankMember" xlink:label="loc_avnw_SiliconValleyBankMember_2C7DBB68BE6E5E81835C6948AB06E905" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_481CFC6B7D145750B497E56EA91C61A5" xlink:to="loc_avnw_SiliconValleyBankMember_2C7DBB68BE6E5E81835C6948AB06E905" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_8776414C113B5DBFB4EF5BAEDB537A93" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_206F4EAF5D9F55038503F1CF0FDC19EA" xlink:to="loc_us-gaap_VariableRateAxis_8776414C113B5DBFB4EF5BAEDB537A93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_9B573A7B5E7FC17F0DDE83B2E25DA2A0_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_8776414C113B5DBFB4EF5BAEDB537A93" xlink:to="loc_us-gaap_VariableRateDomain_9B573A7B5E7FC17F0DDE83B2E25DA2A0_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_4A344FDA079D5711A8CBB6BB7C8DDA98" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_8776414C113B5DBFB4EF5BAEDB537A93" xlink:to="loc_us-gaap_VariableRateDomain_4A344FDA079D5711A8CBB6BB7C8DDA98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrimeRateMember" xlink:label="loc_us-gaap_PrimeRateMember_272505B275E0549CAA7073C9BA0A4014" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_4A344FDA079D5711A8CBB6BB7C8DDA98" xlink:to="loc_us-gaap_PrimeRateMember_272505B275E0549CAA7073C9BA0A4014" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_098910DC21305C958D66C132DCD4825C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_206F4EAF5D9F55038503F1CF0FDC19EA" xlink:to="loc_us-gaap_RangeAxis_098910DC21305C958D66C132DCD4825C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_6E8CC7BE2A34DF967FC383B2E25DD592_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_098910DC21305C958D66C132DCD4825C" xlink:to="loc_us-gaap_RangeMember_6E8CC7BE2A34DF967FC383B2E25DD592_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_946BF30E01C356B2A719BE6651E0FDE9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_098910DC21305C958D66C132DCD4825C" xlink:to="loc_us-gaap_RangeMember_946BF30E01C356B2A719BE6651E0FDE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_AEA30BB34A0C5165A91E2582223FB0E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_946BF30E01C356B2A719BE6651E0FDE9" xlink:to="loc_us-gaap_MinimumMember_AEA30BB34A0C5165A91E2582223FB0E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_1BD1CD20064352A48092BC739BA6F81B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_946BF30E01C356B2A719BE6651E0FDE9" xlink:to="loc_us-gaap_MaximumMember_1BD1CD20064352A48092BC739BA6F81B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ABC8751652755D5E97B35244FCC98773" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ABC8751652755D5E97B35244FCC98773" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:label="loc_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_1E7D432EF9765C4387BAE4BB6549DC0D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_1E7D432EF9765C4387BAE4BB6549DC0D" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_LineOfCreditFacilityEarlyTerminationFeePercentage" xlink:label="loc_avnw_LineOfCreditFacilityEarlyTerminationFeePercentage_E5BD69801F09521D8490B6202F8563E3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_avnw_LineOfCreditFacilityEarlyTerminationFeePercentage_E5BD69801F09521D8490B6202F8563E3" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_LineofCreditFacilityCurrentBorrowingCapacityPercentageofAccountsReceivabletobeIncludedinCalculation" xlink:label="loc_avnw_LineofCreditFacilityCurrentBorrowingCapacityPercentageofAccountsReceivabletobeIncludedinCalculation_9A6E2DDA3E7A52A283CD72040DC9481F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_avnw_LineofCreditFacilityCurrentBorrowingCapacityPercentageofAccountsReceivabletobeIncludedinCalculation_9A6E2DDA3E7A52A283CD72040DC9481F" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_LineofCreditFacilityCurrentBorrowingCapacityAgeofPastDueAccountsReceivablefromCertainHighQualityCustomers" xlink:label="loc_avnw_LineofCreditFacilityCurrentBorrowingCapacityAgeofPastDueAccountsReceivablefromCertainHighQualityCustomers_BD0806D61CC1598FBF3BD03E25B0852D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_avnw_LineofCreditFacilityCurrentBorrowingCapacityAgeofPastDueAccountsReceivablefromCertainHighQualityCustomers_BD0806D61CC1598FBF3BD03E25B0852D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_634DE672BDCD578A86350555563BEF5F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_ShortTermBorrowings_634DE672BDCD578A86350555563BEF5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:label="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_9925DD47D20F5055871B2615BA2B901F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_9925DD47D20F5055871B2615BA2B901F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_442E281AF3525D1DBA761446804FF236" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_442E281AF3525D1DBA761446804FF236" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_F9A4E7E0060455D08291A197126CC6B2" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_F9A4E7E0060455D08291A197126CC6B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_D79F4B15D1B25437A8E809B45F3E7BAC" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_D79F4B15D1B25437A8E809B45F3E7BAC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_B2F25059CAB2535F8264709358088D0B" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_B2F25059CAB2535F8264709358088D0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_88454C8C4329599AA1CAD79CD90257AC" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_88454C8C4329599AA1CAD79CD90257AC" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_DebtInstrumentDebtDefaultBasisSpreadonApplicableInterestRate" xlink:label="loc_avnw_DebtInstrumentDebtDefaultBasisSpreadonApplicableInterestRate_0A9402E9BF0E5497B1FBE5C2CCD3469E" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8E0240498CB75967BAAA307140A83E77" xlink:to="loc_avnw_DebtInstrumentDebtDefaultBasisSpreadonApplicableInterestRate_0A9402E9BF0E5497B1FBE5C2CCD3469E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilities" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_EBB059BFB5AC5FA6958D5CAB676F8195" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_BB29738E2CA756B89364C0A41425DA9D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_EBB059BFB5AC5FA6958D5CAB676F8195" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_BB29738E2CA756B89364C0A41425DA9D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_FF3B04E1D49550AB84B28943FEEE10A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_BB29738E2CA756B89364C0A41425DA9D" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_FF3B04E1D49550AB84B28943FEEE10A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_358AB6B038E561B720DC3BC4661210BB_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_FF3B04E1D49550AB84B28943FEEE10A9" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_358AB6B038E561B720DC3BC4661210BB_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_374E8D0816CB55FE891FE1CF58601BE0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_FF3B04E1D49550AB84B28943FEEE10A9" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_374E8D0816CB55FE891FE1CF58601BE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_B79696F4662B56DAA6ADA97D1B08C233" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_374E8D0816CB55FE891FE1CF58601BE0" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_B79696F4662B56DAA6ADA97D1B08C233" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_A55A63BE32CE57E6969B1350492E8C27" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_BB29738E2CA756B89364C0A41425DA9D" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_A55A63BE32CE57E6969B1350492E8C27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8314F48251F241B80E673BC46612E259_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_A55A63BE32CE57E6969B1350492E8C27" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8314F48251F241B80E673BC46612E259_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8AC7142A8CF75D9ABE1104A7442E5ACC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_A55A63BE32CE57E6969B1350492E8C27" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8AC7142A8CF75D9ABE1104A7442E5ACC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_0E9FD48175545D6AA27E8BB5F6B63428" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8AC7142A8CF75D9ABE1104A7442E5ACC" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_0E9FD48175545D6AA27E8BB5F6B63428" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_2186E32456CE5E6F8E0DA4AD6F7401B5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_8AC7142A8CF75D9ABE1104A7442E5ACC" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_2186E32456CE5E6F8E0DA4AD6F7401B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_A1BD5A9AE9C9545EBB5CAA157E564F1F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_BB29738E2CA756B89364C0A41425DA9D" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_A1BD5A9AE9C9545EBB5CAA157E564F1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_746CD5E137881257EC3C3BC46613FFCF_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_A1BD5A9AE9C9545EBB5CAA157E564F1F" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_746CD5E137881257EC3C3BC46613FFCF_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A1947090A81251B686A909970F9F29DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_A1BD5A9AE9C9545EBB5CAA157E564F1F" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A1947090A81251B686A909970F9F29DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_EA6E83F36F9D57C18C82391B6AB08538" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A1947090A81251B686A909970F9F29DD" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_EA6E83F36F9D57C18C82391B6AB08538" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_D1A64ED0E6A655EB9C061BB04D49C703" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A1947090A81251B686A909970F9F29DD" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_D1A64ED0E6A655EB9C061BB04D49C703" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_CDB20096A8D5587B852CD9F6D67BCC49" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A1947090A81251B686A909970F9F29DD" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_CDB20096A8D5587B852CD9F6D67BCC49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_034AC680421A52878C394B6E150950F0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_BB29738E2CA756B89364C0A41425DA9D" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_034AC680421A52878C394B6E150950F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_533C99FFE5F2910EDD913BC4661301F4_D91C461EEC2F585394ECDD20BD813206" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_034AC680421A52878C394B6E150950F0" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_533C99FFE5F2910EDD913BC4661301F4_D91C461EEC2F585394ECDD20BD813206" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_8DD7B791B73A5EAE8710A490A56B05E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_034AC680421A52878C394B6E150950F0" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_8DD7B791B73A5EAE8710A490A56B05E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_F392082E2318599B97FC76609E924886" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_8DD7B791B73A5EAE8710A490A56B05E3" xlink:to="loc_us-gaap_MoneyMarketFundsMember_F392082E2318599B97FC76609E924886" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BankTimeDepositsMember" xlink:label="loc_us-gaap_BankTimeDepositsMember_2E688D157F50557E88BE4BFF978DF522" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_8DD7B791B73A5EAE8710A490A56B05E3" xlink:to="loc_us-gaap_BankTimeDepositsMember_2E688D157F50557E88BE4BFF978DF522" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_53568595CB7F52CEBDA02672F73BCBD4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_EBB059BFB5AC5FA6958D5CAB676F8195" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_53568595CB7F52CEBDA02672F73BCBD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAbstract" xlink:label="loc_us-gaap_CashAndCashEquivalentsAbstract_D9956AEC1A3B5193AD42DEB0BD648A5C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_53568595CB7F52CEBDA02672F73BCBD4" xlink:to="loc_us-gaap_CashAndCashEquivalentsAbstract_D9956AEC1A3B5193AD42DEB0BD648A5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_96FB23169DB153BDAAA689F27E090704" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsAbstract_D9956AEC1A3B5193AD42DEB0BD648A5C" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_96FB23169DB153BDAAA689F27E090704" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_2E7437E7A6B75D93BAAA5290BCCEB865" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsAbstract_D9956AEC1A3B5193AD42DEB0BD648A5C" xlink:to="loc_us-gaap_AvailableForSaleSecurities_2E7437E7A6B75D93BAAA5290BCCEB865" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCurrencyContractAssetFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_4ECAD9DB504655B180C2570B6FA0759D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsAbstract_D9956AEC1A3B5193AD42DEB0BD648A5C" xlink:to="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_4ECAD9DB504655B180C2570B6FA0759D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_403B1546913357ABADAF7B4EC984DA6C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsAbstract_D9956AEC1A3B5193AD42DEB0BD648A5C" xlink:to="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_403B1546913357ABADAF7B4EC984DA6C" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure" xlink:label="loc_avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure_F94226BDD2545129B8462B689D6DE5E8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_EBB059BFB5AC5FA6958D5CAB676F8195" xlink:to="loc_avnw_MoneyMarketNetAssetValuePerShareFairValueDisclosure_F94226BDD2545129B8462B689D6DE5E8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/FairValueMeasurementsOfAssetsAndLiabilitiesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxContingencyLineItems" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_307BDFBFA91F72D9A2F9644DB9EBD6A4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxContingencyTable" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_27AC87304EA8AF581038644DB9EACFCA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_307BDFBFA91F72D9A2F9644DB9EBD6A4" xlink:to="loc_us-gaap_IncomeTaxContingencyTable_27AC87304EA8AF581038644DB9EACFCA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_3A45B1780BE4BC641DBB644DB9EAC185" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_27AC87304EA8AF581038644DB9EACFCA" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_3A45B1780BE4BC641DBB644DB9EAC185" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_9AA5F7ECD7CC4F782FF1644DB9EA57EE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_3A45B1780BE4BC641DBB644DB9EAC185" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_9AA5F7ECD7CC4F782FF1644DB9EA57EE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_9AA5F7ECD7CC4F782FF1644DB9EA57EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_3A45B1780BE4BC641DBB644DB9EAC185" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_9AA5F7ECD7CC4F782FF1644DB9EA57EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_85DC40A0863FFA762F62644DB9EA4F4B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_9AA5F7ECD7CC4F782FF1644DB9EA57EE" xlink:to="loc_us-gaap_ForeignCountryMember_85DC40A0863FFA762F62644DB9EA4F4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_2486226B9ABCDF772A79644DB9EB3DAF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_27AC87304EA8AF581038644DB9EACFCA" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_2486226B9ABCDF772A79644DB9EB3DAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_133ED2C378864F5C42CF644DB9EB5833_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_2486226B9ABCDF772A79644DB9EB3DAF" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_133ED2C378864F5C42CF644DB9EB5833_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_133ED2C378864F5C42CF644DB9EB5833" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_2486226B9ABCDF772A79644DB9EB3DAF" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_133ED2C378864F5C42CF644DB9EB5833" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InlandRevenueSingaporeIRASMember" xlink:label="loc_us-gaap_InlandRevenueSingaporeIRASMember_3442FDFD394B778E8230644DB9EB7D32" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_133ED2C378864F5C42CF644DB9EB5833" xlink:to="loc_us-gaap_InlandRevenueSingaporeIRASMember_3442FDFD394B778E8230644DB9EB7D32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_4D6E46C030C5336043DB645516EFDF23" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_27AC87304EA8AF581038644DB9EACFCA" xlink:to="loc_us-gaap_StatementScenarioAxis_4D6E46C030C5336043DB645516EFDF23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_AEE982CCC758FBBAFC7D645517F4961E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_4D6E46C030C5336043DB645516EFDF23" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_AEE982CCC758FBBAFC7D645517F4961E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_AEE982CCC758FBBAFC7D645517F4961E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_4D6E46C030C5336043DB645516EFDF23" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_AEE982CCC758FBBAFC7D645517F4961E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_991673DD6D8B34D1410664553346DC90" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_AEE982CCC758FBBAFC7D645517F4961E" xlink:to="loc_us-gaap_ScenarioForecastMember_991673DD6D8B34D1410664553346DC90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8707EC040609102AD27F644DB9E932C7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_307BDFBFA91F72D9A2F9644DB9EBD6A4" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8707EC040609102AD27F644DB9E932C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_us-gaap_IncomeTaxesPaid_D6290769235B3566487F644DB9EB5EF3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_307BDFBFA91F72D9A2F9644DB9EBD6A4" xlink:to="loc_us-gaap_IncomeTaxesPaid_D6290769235B3566487F644DB9EB5EF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIncomeTaxRefunds" xlink:label="loc_us-gaap_ProceedsFromIncomeTaxRefunds_F41BB71D7159633E4D2A644DB9EB610E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_307BDFBFA91F72D9A2F9644DB9EBD6A4" xlink:to="loc_us-gaap_ProceedsFromIncomeTaxRefunds_F41BB71D7159633E4D2A644DB9EB610E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomePerShareOfCommonStock" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomePerShareOfCommonStockDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_2144B88684C7867F90F8532BC7D2BF0B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1A81338B7B6DED3506A6532BC7D25E1C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_2144B88684C7867F90F8532BC7D2BF0B" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1A81338B7B6DED3506A6532BC7D25E1C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_D99157DAC85A48B48E00532BC7D2A851" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1A81338B7B6DED3506A6532BC7D25E1C" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_D99157DAC85A48B48E00532BC7D2A851" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_98E895763D71609ED9FD532BC7D28845_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_D99157DAC85A48B48E00532BC7D2A851" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_98E895763D71609ED9FD532BC7D28845_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_98E895763D71609ED9FD532BC7D28845" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_D99157DAC85A48B48E00532BC7D2A851" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_98E895763D71609ED9FD532BC7D28845" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_27260323B4386BE69335532BC7D2A579" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_98E895763D71609ED9FD532BC7D28845" xlink:to="loc_us-gaap_EmployeeStockOptionMember_27260323B4386BE69335532BC7D2A579" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember" xlink:label="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_4D8B3E41788FADD96207532BC7D29B20" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_98E895763D71609ED9FD532BC7D28845" xlink:to="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_4D8B3E41788FADD96207532BC7D29B20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1CE315B5EE50A4EAF38C532BC7D22540" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_2144B88684C7867F90F8532BC7D2BF0B" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1CE315B5EE50A4EAF38C532BC7D22540" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/NetIncomePerShareOfCommonStockTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RestructuringActivities" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RestructuringActivitiesRestructuringLiabilityDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_0EE46B83E5054CD71F5858AE1DA0F03C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0F200323309CEA80388858AE1D9F45C7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_0EE46B83E5054CD71F5858AE1DA0F03C" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0F200323309CEA80388858AE1D9F45C7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_05B75A1DD9DA3A298F8B58AE1DA04A6B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0F200323309CEA80388858AE1D9F45C7" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_05B75A1DD9DA3A298F8B58AE1DA04A6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_01F7A7DD90DEBFAE3D0558AE1DA0134B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_05B75A1DD9DA3A298F8B58AE1DA04A6B" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_01F7A7DD90DEBFAE3D0558AE1DA0134B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_01F7A7DD90DEBFAE3D0558AE1DA0134B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_05B75A1DD9DA3A298F8B58AE1DA04A6B" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_01F7A7DD90DEBFAE3D0558AE1DA0134B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="loc_us-gaap_EmployeeSeveranceMember_39B7C08877DB9274CF0E58AE1DA0CC15" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_01F7A7DD90DEBFAE3D0558AE1DA0134B" xlink:to="loc_us-gaap_EmployeeSeveranceMember_39B7C08877DB9274CF0E58AE1DA0CC15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FacilityClosingMember" xlink:label="loc_us-gaap_FacilityClosingMember_1D3C3182A6E726EFF32C58AE1DA04DC0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_01F7A7DD90DEBFAE3D0558AE1DA0134B" xlink:to="loc_us-gaap_FacilityClosingMember_1D3C3182A6E726EFF32C58AE1DA04DC0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringPlanAxis" xlink:label="loc_us-gaap_RestructuringPlanAxis_A4A37AF8F1D7622FD2B858AE1DA08110" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0F200323309CEA80388858AE1D9F45C7" xlink:to="loc_us-gaap_RestructuringPlanAxis_A4A37AF8F1D7622FD2B858AE1DA08110" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_A4A37AF8F1D7622FD2B858AE1DA08110" xlink:to="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_A4A37AF8F1D7622FD2B858AE1DA08110" xlink:to="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_FiscalThousandSixteentoSeventeenPlanMember" xlink:label="loc_avnw_FiscalThousandSixteentoSeventeenPlanMember_E99B937AE47930C17F7058AE1DA029B9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63" xlink:to="loc_avnw_FiscalThousandSixteentoSeventeenPlanMember_E99B937AE47930C17F7058AE1DA029B9" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_FiscalTwoThousandFifteenSixteenPlanMember" xlink:label="loc_avnw_FiscalTwoThousandFifteenSixteenPlanMember_FB80E193EBDD34D66FE758AE1DA0AE90" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63" xlink:to="loc_avnw_FiscalTwoThousandFifteenSixteenPlanMember_FB80E193EBDD34D66FE758AE1DA0AE90" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_FiscalTwoThousandFourteenFifteenPlanMember" xlink:label="loc_avnw_FiscalTwoThousandFourteenFifteenPlanMember_692E826AA905E4833C9B58AE1DA0460F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63" xlink:to="loc_avnw_FiscalTwoThousandFourteenFifteenPlanMember_692E826AA905E4833C9B58AE1DA0460F" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_FiscalTwoThousandThirteenFourteenPlanMember" xlink:label="loc_avnw_FiscalTwoThousandThirteenFourteenPlanMember_2D5114E3BB4D33896D8158AE1DA0699F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_1246C5AF9903A7FA059D58AE1DA05A63" xlink:to="loc_avnw_FiscalTwoThousandThirteenFourteenPlanMember_2D5114E3BB4D33896D8158AE1DA0699F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="loc_us-gaap_RestructuringReserveRollForward_9343D55ECD552F8F8A0E58AE1DA06BA7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_0EE46B83E5054CD71F5858AE1DA0F03C" xlink:to="loc_us-gaap_RestructuringReserveRollForward_9343D55ECD552F8F8A0E58AE1DA06BA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="loc_us-gaap_RestructuringReserve_EA78AFEE5D0173FEB2B958AE1DA16876" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_9343D55ECD552F8F8A0E58AE1DA06BA7" xlink:to="loc_us-gaap_RestructuringReserve_EA78AFEE5D0173FEB2B958AE1DA16876" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_E3911E3FC3BCF68D28C658AE1DA1B9EB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_9343D55ECD552F8F8A0E58AE1DA06BA7" xlink:to="loc_us-gaap_RestructuringCharges_E3911E3FC3BCF68D28C658AE1DA1B9EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="loc_us-gaap_PaymentsForRestructuring_3B0B9BC6F66AF5527CC158AE1DA124A3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_9343D55ECD552F8F8A0E58AE1DA06BA7" xlink:to="loc_us-gaap_PaymentsForRestructuring_3B0B9BC6F66AF5527CC158AE1DA124A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringReserveTranslationAdjustment" xlink:label="loc_us-gaap_RestructuringReserveTranslationAdjustment_6286F4D7B548328D96BA58AE1DA1F75C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_9343D55ECD552F8F8A0E58AE1DA06BA7" xlink:to="loc_us-gaap_RestructuringReserveTranslationAdjustment_6286F4D7B548328D96BA58AE1DA1F75C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringReserveCurrent" xlink:label="loc_us-gaap_RestructuringReserveCurrent_A57B00D3DD4B1D4BC37B58AE1DA6751B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_0EE46B83E5054CD71F5858AE1DA0F03C" xlink:to="loc_us-gaap_RestructuringReserveCurrent_A57B00D3DD4B1D4BC37B58AE1DA6751B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringReserveNoncurrent" xlink:label="loc_us-gaap_RestructuringReserveNoncurrent_0296FBCB419136A2DAE558AE1DA63078" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_0EE46B83E5054CD71F5858AE1DA0F03C" xlink:to="loc_us-gaap_RestructuringReserveNoncurrent_0296FBCB419136A2DAE558AE1DA63078" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/RestructuringActivitiesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentAndGeographicInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentAndGeographicInformationScheduleOfRevenuesByGeographicRegionDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_5B521A23625747097B7CDAB4459A47FD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_9FF8989387F55F64DEF1DAB4459AE6D6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_5B521A23625747097B7CDAB4459A47FD" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_9FF8989387F55F64DEF1DAB4459AE6D6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_4D969D0F80FAEF12BB28DAB4459A120D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_9FF8989387F55F64DEF1DAB4459AE6D6" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_4D969D0F80FAEF12BB28DAB4459A120D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_C830F11536683293FB33DAB4459AC392_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_4D969D0F80FAEF12BB28DAB4459A120D" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_C830F11536683293FB33DAB4459AC392_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_C830F11536683293FB33DAB4459AC392" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_4D969D0F80FAEF12BB28DAB4459A120D" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_C830F11536683293FB33DAB4459AC392" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsReceivableMember" xlink:label="loc_us-gaap_AccountsReceivableMember_5C2731903FE7311A6F08DAB4459A43AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_C830F11536683293FB33DAB4459AC392" xlink:to="loc_us-gaap_AccountsReceivableMember_5C2731903FE7311A6F08DAB4459A43AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:label="loc_us-gaap_SalesRevenueNetMember_27C3ACCCE96C16E47CEDDAB4459AFA88" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_C830F11536683293FB33DAB4459AC392" xlink:to="loc_us-gaap_SalesRevenueNetMember_27C3ACCCE96C16E47CEDDAB4459AFA88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_952DD6F44D72A482E3A4DAB4459ABA5C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_9FF8989387F55F64DEF1DAB4459AE6D6" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_952DD6F44D72A482E3A4DAB4459ABA5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_98416FAC27B0219C940DDAB4459AFC69_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_952DD6F44D72A482E3A4DAB4459ABA5C" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_98416FAC27B0219C940DDAB4459AFC69_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_98416FAC27B0219C940DDAB4459AFC69" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_952DD6F44D72A482E3A4DAB4459ABA5C" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_98416FAC27B0219C940DDAB4459AFC69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_A39281CBE37A02DA25EBDAB4459A0B19" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_98416FAC27B0219C940DDAB4459AFC69" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_A39281CBE37A02DA25EBDAB4459A0B19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_72029330BFEE50686743DAB4459A0A20" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_9FF8989387F55F64DEF1DAB4459AE6D6" xlink:to="loc_us-gaap_MajorCustomersAxis_72029330BFEE50686743DAB4459A0A20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_5FB41BAD6A408B24A3C5DAB4459A92B6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MajorCustomersAxis_72029330BFEE50686743DAB4459A0A20" xlink:to="loc_us-gaap_NameOfMajorCustomerDomain_5FB41BAD6A408B24A3C5DAB4459A92B6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_5FB41BAD6A408B24A3C5DAB4459A92B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MajorCustomersAxis_72029330BFEE50686743DAB4459A0A20" xlink:to="loc_us-gaap_NameOfMajorCustomerDomain_5FB41BAD6A408B24A3C5DAB4459A92B6" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_MobileTelephoneNetworksMember" xlink:label="loc_avnw_MobileTelephoneNetworksMember_351C64CF940FEBE54772DAB4459A4DB5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_5FB41BAD6A408B24A3C5DAB4459A92B6" xlink:to="loc_avnw_MobileTelephoneNetworksMember_351C64CF940FEBE54772DAB4459A4DB5" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_MotorolaMember" xlink:label="loc_avnw_MotorolaMember_A47AE5E56B9F9431FD61DAB4459ADB2E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_5FB41BAD6A408B24A3C5DAB4459A92B6" xlink:to="loc_avnw_MotorolaMember_A47AE5E56B9F9431FD61DAB4459ADB2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_6F426CBFCCB8154A4424DAB4459A577A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_9FF8989387F55F64DEF1DAB4459AE6D6" xlink:to="loc_us-gaap_StatementGeographicalAxis_6F426CBFCCB8154A4424DAB4459A577A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_6F426CBFCCB8154A4424DAB4459A577A" xlink:to="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_6F426CBFCCB8154A4424DAB4459A577A" xlink:to="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NorthAmericaMember" xlink:label="loc_us-gaap_NorthAmericaMember_0F7B25B92B068CEC12E9DAB4459A23B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D" xlink:to="loc_us-gaap_NorthAmericaMember_0F7B25B92B068CEC12E9DAB4459A23B3" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_AfricaAndMiddleEastMember" xlink:label="loc_avnw_AfricaAndMiddleEastMember_896D9CF96EBCDE497764DAB4459A0C7B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D" xlink:to="loc_avnw_AfricaAndMiddleEastMember_896D9CF96EBCDE497764DAB4459A0C7B" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_EuropeAndRussiaMember" xlink:label="loc_avnw_EuropeAndRussiaMember_299C83443B7867B06CCADAB4459AAA99" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D" xlink:to="loc_avnw_EuropeAndRussiaMember_299C83443B7867B06CCADAB4459AAA99" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_LatinAmericaAndAsiaPacificMember" xlink:label="loc_avnw_LatinAmericaAndAsiaPacificMember_C1DABCE334532B8C7B17DAB4459AF7C9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_B09E9F779C23872B4EEEDAB4459AB51D" xlink:to="loc_avnw_LatinAmericaAndAsiaPacificMember_C1DABCE334532B8C7B17DAB4459AF7C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_45E8822048B034BAEEFEDAB4459AFCB2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_5B521A23625747097B7CDAB4459A47FD" xlink:to="loc_us-gaap_NumberOfReportableSegments_45E8822048B034BAEEFEDAB4459AFCB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_7364BAFE732E00E7BD30DAB4459A5773" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_5B521A23625747097B7CDAB4459A47FD" xlink:to="loc_us-gaap_SalesRevenueNet_7364BAFE732E00E7BD30DAB4459A5773" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_FE33786C67C982C0C67DDAB4459A7986" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_5B521A23625747097B7CDAB4459A47FD" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_FE33786C67C982C0C67DDAB4459A7986" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/SegmentAndGeographicInformationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquity" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5DD0AC140B0D9FBA51C24CEDCA6489F1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F149FEB3E09FC13C6D354CEDCA64AFB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5DD0AC140B0D9FBA51C24CEDCA6489F1" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F149FEB3E09FC13C6D354CEDCA64AFB1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_6E50A209597DD8E26C7E4CEDCA64FCD1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F149FEB3E09FC13C6D354CEDCA64AFB1" xlink:to="loc_us-gaap_PlanNameAxis_6E50A209597DD8E26C7E4CEDCA64FCD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_00F3F8A5B51F90ADAA184CEDCA648139_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_6E50A209597DD8E26C7E4CEDCA64FCD1" xlink:to="loc_us-gaap_PlanNameDomain_00F3F8A5B51F90ADAA184CEDCA648139_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_00F3F8A5B51F90ADAA184CEDCA648139" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_6E50A209597DD8E26C7E4CEDCA64FCD1" xlink:to="loc_us-gaap_PlanNameDomain_00F3F8A5B51F90ADAA184CEDCA648139" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_A2007StockPlanMember" xlink:label="loc_avnw_A2007StockPlanMember_8CC87F61CCCE67DA67744CEDCA645D44" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_00F3F8A5B51F90ADAA184CEDCA648139" xlink:to="loc_avnw_A2007StockPlanMember_8CC87F61CCCE67DA67744CEDCA645D44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_B5D2333979D93CC67ACE4CEDCA64926F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F149FEB3E09FC13C6D354CEDCA64AFB1" xlink:to="loc_us-gaap_AwardTypeAxis_B5D2333979D93CC67ACE4CEDCA64926F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E1F2F029970F8DD02F0C4CEDCA64BDF3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_B5D2333979D93CC67ACE4CEDCA64926F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E1F2F029970F8DD02F0C4CEDCA64BDF3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E1F2F029970F8DD02F0C4CEDCA64BDF3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_B5D2333979D93CC67ACE4CEDCA64926F" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E1F2F029970F8DD02F0C4CEDCA64BDF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_BCC2805E401E5DF069974CEDCA64C102" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E1F2F029970F8DD02F0C4CEDCA64BDF3" xlink:to="loc_us-gaap_EmployeeStockOptionMember_BCC2805E401E5DF069974CEDCA64C102" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember" xlink:label="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_F4B6DA212C21684F9B4B4CEDCA642CF5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_E1F2F029970F8DD02F0C4CEDCA64BDF3" xlink:to="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_F4B6DA212C21684F9B4B4CEDCA642CF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_DDF47E72E2EC7B6DD6C24CEDCA64F148" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5DD0AC140B0D9FBA51C24CEDCA6489F1" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_DDF47E72E2EC7B6DD6C24CEDCA64F148" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_89369918C99DB121DDCD4CEDCA642BA0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5DD0AC140B0D9FBA51C24CEDCA6489F1" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_89369918C99DB121DDCD4CEDCA642BA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_2FB5FFD0A2C1054F24A74CEDCA6471A4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5DD0AC140B0D9FBA51C24CEDCA6489F1" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_2FB5FFD0A2C1054F24A74CEDCA6471A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_29B2DCD6AAC0D4495CDD4CEDCA64173D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_5DD0AC140B0D9FBA51C24CEDCA6489F1" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_29B2DCD6AAC0D4495CDD4CEDCA64173D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityStockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B2610F719148A40B15594CEDCA6485FF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_853703D72FEFC7DB415B4CEDCA6441D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B2610F719148A40B15594CEDCA6485FF" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_853703D72FEFC7DB415B4CEDCA6441D7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_995A275BEBDCBD5651684CEDCA64D70B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_853703D72FEFC7DB415B4CEDCA6441D7" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_995A275BEBDCBD5651684CEDCA64D70B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_7B288B213A5AF717C9414CEDCA643E7E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_995A275BEBDCBD5651684CEDCA64D70B" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_7B288B213A5AF717C9414CEDCA643E7E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_7B288B213A5AF717C9414CEDCA643E7E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_995A275BEBDCBD5651684CEDCA64D70B" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_7B288B213A5AF717C9414CEDCA643E7E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_18FFA461E693327537584CEDCA64A962" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_7B288B213A5AF717C9414CEDCA643E7E" xlink:to="loc_us-gaap_CostOfSalesMember_18FFA461E693327537584CEDCA64A962" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_278F2F139993FAC5D4ED4CEDCA64A28D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_7B288B213A5AF717C9414CEDCA643E7E" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_278F2F139993FAC5D4ED4CEDCA64A28D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_F6A0DB5149002D92E11E4CEDCA64D416" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_7B288B213A5AF717C9414CEDCA643E7E" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_F6A0DB5149002D92E11E4CEDCA64D416" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_1E7A43B193B0040380F84CEDCA64BDAD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_853703D72FEFC7DB415B4CEDCA6441D7" xlink:to="loc_us-gaap_AwardTypeAxis_1E7A43B193B0040380F84CEDCA64BDAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_295617A9995EAEA6EC6F4CEDCA64C996_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_1E7A43B193B0040380F84CEDCA64BDAD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_295617A9995EAEA6EC6F4CEDCA64C996_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_295617A9995EAEA6EC6F4CEDCA64C996" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_1E7A43B193B0040380F84CEDCA64BDAD" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_295617A9995EAEA6EC6F4CEDCA64C996" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_50DDBA1D9FCC7AF0074F4CEDCA642D11" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_295617A9995EAEA6EC6F4CEDCA64C996" xlink:to="loc_us-gaap_EmployeeStockOptionMember_50DDBA1D9FCC7AF0074F4CEDCA642D11" xlink:type="arc" />
    <link:loc xlink:href="avnw-20171229.xsd#avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember" xlink:label="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_D9717EE53E72188E42674CEDCA64BE04" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_295617A9995EAEA6EC6F4CEDCA64C996" xlink:to="loc_avnw_RestrictedStockRestrictedStockUnitsPerformanceSharesandPerformanceUnitsMember_D9717EE53E72188E42674CEDCA64BE04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_5CF2596F53E90961D5E54CEDCA64B59D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B2610F719148A40B15594CEDCA6485FF" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_5CF2596F53E90961D5E54CEDCA64B59D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/StockholdersEquityTables" xlink:type="extended" />
</link:linkbase>
