The Collaborative International Dictionary of English v.0.48:

Utes \Utes\, n. pl.; sing. Ute. (Ethnol.)
   An extensive tribe of North American Indians of the Shoshone
   stock, inhabiting Colorado, Utah, New Mexico, Arizona, and
   adjacent regions. They are subdivided into several
   subordinate tribes, some of which are among the most degraded
   of North American Indians.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Ute
    n 1: a member of the Shoshonean people of Utah and Colorado and
         New Mexico
    2: the Shoshonean language spoken by the Utes