Source : Webster's Revised Unabridged Dictionary (1913)

Comanches \Co*man"ches\ (? or ?), n. pl.; sing. {Comanche} (? or
   ?). (Ethnol.)
   A warlike, savage, and nomadic tribe of the Shoshone family
   of Indians, inhabiting Mexico and the adjacent parts of the
   United States; -- called also {Paducahs}. They are noted for
   plundering and cruelty.

Source : WordNet®

Comanche
     n 1: a member of the Shoshonean people who formerly lived between
          Wyoming and the Mexican border but are now chiefly in
          Oklahoma
     2: the Shoshonean language spoken by the Comanche people