n.
Pronunciation: ' an(t)-s ə - ˌ ler- ē , - ˌ le-r ē , esp Brit an- ' si-l ə -r ē
Function: adjective
Date: 1667
1 : SUBORDINATE , SUBSIDIARY <the main factory and its ancillary plants>
2 : AUXILIARY , SUPPLEMENTARY <the need for ancillary evidence>
– ancillary noun