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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:01a06777-c679-7dd9-9227-410403c84b03,g:e5861e6c-ddef-4324-ad7b-5aef271c1b1f-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.us.aviatnetworks.com/role/Cover" xlink:type="simple" xlink:href="avnw-20260902.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.us.aviatnetworks.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityListingsLineItems_01a06777-c67a-7937-9f27-87bdeab347a2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityListingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityListingsTable_01a06777-c67a-781f-b36d-bb15019e67a0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityListingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityListingsLineItems_01a06777-c67a-7937-9f27-87bdeab347a2" xlink:to="loc_dei_EntityListingsTable_01a06777-c67a-781f-b36d-bb15019e67a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a06777-c67a-759a-88ae-675af104af7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntityListingsTable_01a06777-c67a-781f-b36d-bb15019e67a0" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a06777-c67a-759a-88ae-675af104af7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a06777-c67a-759a-88ae-675af104af7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a06777-c67a-759a-88ae-675af104af7e" xlink:to="loc_us-gaap_ClassOfStockDomain_01a06777-c67a-759a-88ae-675af104af7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a06777-c67a-730b-b295-d1b394e86bec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a06777-c67a-759a-88ae-675af104af7e" xlink:to="loc_us-gaap_ClassOfStockDomain_01a06777-c67a-730b-b295-d1b394e86bec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_01a06777-c67a-73c5-bfdd-11199ed3471d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a06777-c67a-730b-b295-d1b394e86bec" xlink:to="loc_us-gaap_CommonStockMember_01a06777-c67a-73c5-bfdd-11199ed3471d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_01a06777-c67a-7b48-8914-45314c4240c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a06777-c67a-730b-b295-d1b394e86bec" xlink:to="loc_us-gaap_PreferredStockMember_01a06777-c67a-7b48-8914-45314c4240c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_01a06777-c67a-7bab-8fc4-1c2d19d09aaa" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_01a06777-c67a-7937-9f27-87bdeab347a2" xlink:to="loc_dei_Security12bTitle_01a06777-c67a-7bab-8fc4-1c2d19d09aaa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_01a06777-c67a-743b-98b5-fbc30659ed94" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_01a06777-c67a-7937-9f27-87bdeab347a2" xlink:to="loc_dei_TradingSymbol_01a06777-c67a-743b-98b5-fbc30659ed94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_01a06777-c67a-71f4-b491-4cc7f4866534" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_01a06777-c67a-7937-9f27-87bdeab347a2" xlink:to="loc_dei_SecurityExchangeName_01a06777-c67a-71f4-b491-4cc7f4866534" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_NoTradingSymbolFlag_01a06777-c67a-7fd9-b4ab-caf9824e9906" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_NoTradingSymbolFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_01a06777-c67a-7937-9f27-87bdeab347a2" xlink:to="loc_dei_NoTradingSymbolFlag_01a06777-c67a-7fd9-b4ab-caf9824e9906" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_01a06777-c67a-7b98-a4bf-7e0d02df2980" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_01a06777-c67a-7937-9f27-87bdeab347a2" xlink:to="loc_dei_DocumentPeriodEndDate_01a06777-c67a-7b98-a4bf-7e0d02df2980" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
