Main Entry: gran·dam

Pronunciation: \ˈgran-ˌdam, -dəm\

Function: noun

Etymology: Middle English graundam, from Anglo-French graund dame, literally, great lady

Date: 13th century

1or gran·dame \-ˌdām\ a : grandmother b : an old woman
2or grand·dam \-ˌdam, -dəm\ : a dam's or sire's dam —used of an animal