1. A member of a Native American people, divided after 1832 into the Northern and Southern Cheyenne, inhabiting respectively southeast Montana and southern Colorado, with present-day populations in Montana and Oklahoma. The Cheyenne became nomadic buffalo hunters after migrating to the Great Plains in the 18th century and figured prominently in the resistance by Plains Indians to white encroachment.

2. The Algonquian language of the Cheyenne.