Main Entry: grand·sire

Pronunciation: \ˈgran(d)-ˌsī(-ə)r\

Function: noun

Etymology: Middle English

Date: 14th century

1or grand·sir \ˈgran(t)-sər\ dialect : grandfather 1a
2 archaic : forefather
3 archaic : an aged man
4 : a dam's or sire's sire —used of an animal