Onondagas \On`on*da"gas\, n. pl.; sing. {Onondaga}. (Ethnol.) A tribe of Indians formerly inhabiting what is now a part of the State of New York. They were the central or head tribe of the Five Nations.
Onondaga n 1: a member of the Iroquoian people formerly living between Lake Champlain and the Saint Lawrence River 2: the Iroquoian language spoken by the Onondaga people