also As·sin·i·boine noun pl. Assiniboin
a. A Native American people formerly inhabiting southern Manitoba, now located in Montana, Alberta, and Saskatchewan. The Assiniboin became nomadic buffalo hunters after migrating to the northern Great Plains in the 18th century.
b. A member of this people.
- The Siouan language of the Assiniboin.
Origin: French Assiniboine
Origin: , of Ojibwa origin