<?xml version="1.0" encoding="UTF-8"?>
<!-- XBRL document created with DocuBuilder 4.7 by Data Communique, Inc. -->
<link:linkbase 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:delaware="http://delaware/20130121" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Series" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#SeriesOnly"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Class" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ClassOnly"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/Prospectus" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ProspectusOnly"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceTableData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#PerformanceTableData"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ExpenseExample" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ExpenseExample"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/OperatingExpensesData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#OperatingExpensesData"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ShareholderFeesData" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ShareholderFeesData"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#ExpenseExampleNoRedemption"/>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasure" xlink:type="simple" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#PerformanceMeasureOnly"/>
  <link:roleRef roleURI="http://delaware/role/PerformanceTableDataAAAA" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#PerformanceTableDataAAAA"/>
  <link:roleRef roleURI="http://delaware/role/ExpenseExampleAAAA" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#ExpenseExampleAAAA"/>
  <link:roleRef roleURI="http://delaware/role/OperatingExpensesDataAAAA" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#OperatingExpensesDataAAAA"/>
  <link:roleRef roleURI="http://delaware/role/ShareholderFeesDataAAAA" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#ShareholderFeesDataAAAA"/>
  <link:roleRef roleURI="http://delaware/role/ExpenseExampleNoRedemptionAAAA" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#ExpenseExampleNoRedemptionAAAA"/>
  <link:roleRef roleURI="http://delaware/role/BarChartDataAAAA" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#BarChartDataAAAA"/>
  <link:roleRef roleURI="http://delaware/role/PerformanceTableDataBBBB" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#PerformanceTableDataBBBB"/>
  <link:roleRef roleURI="http://delaware/role/ExpenseExampleBBBB" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#ExpenseExampleBBBB"/>
  <link:roleRef roleURI="http://delaware/role/OperatingExpensesDataBBBB" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#OperatingExpensesDataBBBB"/>
  <link:roleRef roleURI="http://delaware/role/ShareholderFeesDataBBBB" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#ShareholderFeesDataBBBB"/>
  <link:roleRef roleURI="http://delaware/role/ExpenseExampleNoRedemptionBBBB" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#ExpenseExampleNoRedemptionBBBB"/>
  <link:roleRef roleURI="http://delaware/role/BarChartDataBBBB" xlink:type="simple" xlink:href="ck0000906236-20121228.xsd#BarChartDataBBBB"/>
  <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: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/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/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:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Prospectus">
    <link:loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_DocumentDomain" xlink:label="DocumentDomain"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_AAAAMember" xlink:label="AAAAMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="AAAAMember" use="optional" order="2.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_BBBBMember" xlink:label="BBBBMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="DocumentDomain" xlink:to="BBBBMember" use="optional" order="3.0"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Series">
    <link:loc xlink:type="locator" xlink:href="http://taxonomies.xbrl.us/us-gaap/2009/non-gaap/dei-2009-01-31.xsd#dei_EntityDomain" xlink:label="EntityDomain"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_S000002413Member" xlink:label="S000002413Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000002413Member" order="2.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_S000002416Member" xlink:label="S000002416Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000002416Member" order="3.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_S000002415Member" xlink:label="S000002415Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000002415Member" order="4.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_S000002414Member" xlink:label="S000002414Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000002414Member" order="5.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_S000002412Member" xlink:label="S000002412Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="S000002412Member" order="6.0"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/Class">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_ShareClassDomain" xlink:label="ShareClassDomain"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006412Member" xlink:label="C000006412Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006412Member" order="2.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006421Member" xlink:label="C000006421Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006421Member" order="3.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006418Member" xlink:label="C000006418Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006418Member" order="4.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006415Member" xlink:label="C000006415Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006415Member" order="5.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006409Member" xlink:label="C000006409Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006409Member" order="6.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006413Member" xlink:label="C000006413Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006413Member" order="7.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006422Member" xlink:label="C000006422Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006422Member" order="8.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006419Member" xlink:label="C000006419Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006419Member" order="9.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006416Member" xlink:label="C000006416Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006416Member" order="10.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006410Member" xlink:label="C000006410Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006410Member" order="11.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006414Member" xlink:label="C000006414Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006414Member" order="12.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006423Member" xlink:label="C000006423Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006423Member" order="13.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006420Member" xlink:label="C000006420Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006420Member" order="14.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006417Member" xlink:label="C000006417Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006417Member" order="15.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000006411Member" xlink:label="C000006411Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000006411Member" order="16.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_C000074152Member" xlink:label="C000074152Member"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000074152Member" order="17.0"/>
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasure">
    <link:loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/rr/2010/rr-2010-02-28.xsd#rr_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_benchmark0094AAAAMember" xlink:label="benchmark0094AAAAMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="benchmark0094AAAAMember" order="116925.0"/>
    <link:loc xlink:type="locator" xlink:href="ck0000906236-20121228.xsd#delaware_benchmark0094BBBBMember" xlink:label="benchmark0094BBBBMember"/>
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="benchmark0094BBBBMember" order="226925.0"/>
  </link:definitionLink>
</link:linkbase>
