<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Tue Aug 18 04:46:13 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#SeriesOnly" roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#ClassOnly" roleURI="http://xbrl.sec.gov/oef/role/ClassOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#RiskOnly" roleURI="http://xbrl.sec.gov/rr/role/RiskOnly"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#PerformanceMeasureOnly" roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
  <definitionLink xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_S000011439Member" xlink:href="ck0000794458-20260831.xsd#ck0000794458_S000011439Member"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="ck0000794458_S000011439Member" order="11" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="oef_ShareClassDomain" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_ShareClassDomain"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_C000031644Member" xlink:href="ck0000794458-20260831.xsd#ck0000794458_C000031644Member"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000794458_C000031644Member" order="11" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_C000260637Member" xlink:href="ck0000794458-20260831.xsd#ck0000794458_C000260637Member"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000794458_C000260637Member" order="12" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_C000192775Member" xlink:href="ck0000794458-20260831.xsd#ck0000794458_C000192775Member"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000794458_C000192775Member" order="13" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_C000192776Member" xlink:href="ck0000794458-20260831.xsd#ck0000794458_C000192776Member"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_ShareClassDomain" xlink:to="ck0000794458_C000192776Member" order="14" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="oef_AllRisksMember" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_AllRisksMember"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_MarketConditionsMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_MarketConditionsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_MarketConditionsMember" order="11" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_IssuerRisksMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_IssuerRisksMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_IssuerRisksMember" order="12" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_InvestingOutsideTheUnitedStatesMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_InvestingOutsideTheUnitedStatesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_InvestingOutsideTheUnitedStatesMember" order="13" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_InvestingInDevelopingCountriesMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_InvestingInDevelopingCountriesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_InvestingInDevelopingCountriesMember" order="14" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_ExposureToCountryRegionIndustryOrSectorMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_ExposureToCountryRegionIndustryOrSectorMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_ExposureToCountryRegionIndustryOrSectorMember" order="15" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_InvestingInGrowthorientedStocksMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_InvestingInGrowthorientedStocksMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_InvestingInGrowthorientedStocksMember" order="16" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_InvestingInSmallCompaniesMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_InvestingInSmallCompaniesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_InvestingInSmallCompaniesMember" order="17" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_InvestingInDepositaryReceiptsMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_InvestingInDepositaryReceiptsMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="ck0000794458_InvestingInDepositaryReceiptsMember" order="18" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="srt_ManagementMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ManagementMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_AllRisksMember" xlink:to="srt_ManagementMember" order="19" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="oef_PerformanceMeasureDomain" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_PerformanceMeasureDomain"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_index_MSCI_Emerging_Markets_Index_reflects_no_deductions_for_expenses_or_US_federal_income_taxesMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_index_MSCI_Emerging_Markets_Index_reflects_no_deductions_for_expenses_or_US_federal_income_taxesMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000794458_index_MSCI_Emerging_Markets_Index_reflects_no_deductions_for_expenses_or_US_federal_income_taxesMember" order="11" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ck0000794458_index_Emerging_Markets_Equity_Historical_Benchmark_Index_reflects_no_deductions_for_expenses_or_US_federal_income_taxesMember" xlink:href="ck0000794458-20260831.xsd#ck0000794458_index_Emerging_Markets_Equity_Historical_Benchmark_Index_reflects_no_deductions_for_expenses_or_US_federal_income_taxesMember"/>
<!-- [WMV7][iXLiJDOcoL8UReZCuckyNdiGDS4t1AB0IDB2MO8bZ+SekQ940Yi015xTM7O7XnObR/pW80qDBaLBhPuXki2zcnSA9JWmcR0DnMg4U9lfGI55eTdIkv9AZX4PGGQgkyXRaJ/2tS257+550V7se1ZXxJQqAAHpKhpF6o3l6a4LaP8F9you62xffoHTwRyctxTayO46q+zCnuJX3Whwh6C8aCcaQ0Vci/miYVCZ4ASAU+BdRVK78KrMZpK4GYf2TY0HoTKbOuTOQY0OpG0PapAcH1vLnzWmeBSq6rgdii3mIzVQfD21N3eisKUnWoElepjndxjWCxsL1p4KRmskzrJUI2l+Fj7cdFjbK48ewCuZ/blJgtdqCp2UKMEWxaWEkk0j7Dnxb0Q4A9qAYt4U0dAuKB1LU141pQ==] CSR-->
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="oef_PerformanceMeasureDomain" xlink:to="ck0000794458_index_Emerging_Markets_Equity_Historical_Benchmark_Index_reflects_no_deductions_for_expenses_or_US_federal_income_taxesMember" order="12" xbrldt:closed="true"/>
  </definitionLink>
</linkbase>
