Source : Webster's Revised Unabridged Dictionary (1913)

Cheyennes \Chey*ennes"\, n. pl.; sing. {cheyenne}. (Ethnol.)
   A warlike tribe of indians, related to the blackfeet,
   formerly inhabiting the region of Wyoming, but now mostly on
   reservations in the Indian Territory. They are noted for
   their horsemanship.

Source : WordNet®

Cheyenne
     n 1: the capital and largest city of Wyoming; located in the
          southeastern corner of the state [syn: {capital of
          Wyoming}]
     2: the Algonquian language spoken by the Cheyenne people
     3: a member of a North American Indian people living on the
        western plains (now living in Oklahoma and Montana)