Source : Webster's Revised Unabridged Dictionary (1913)

Crees \Crees\ (kr[=e]z), n. pl.; sing. {Cree}. (Ethnol.)
   An Algonquin tribe of Indians, inhabiting a large part of
   British America east of the Rocky Mountains and south of
   Hudson's Bay.

Source : WordNet®

Cree
     n 1: a member of an Algonquian people living in central Canada
     2: the Algonquian language spoken by the Cree people