Bighorn

from WordNet (r) 3.0 (2006)

Bighorn
    n 1: a river that flows from central Wyoming to the Yellowstone
         River in southern Montana [syn: {Bighorn}, {Bighorn River}]
    2: wild sheep of mountainous regions of western North America
       having massive curled horns [syn: {bighorn}, {bighorn sheep},
       {cimarron}, {Rocky Mountain bighorn}, {Rocky Mountain sheep},
       {Ovis canadensis}]

from The Collaborative International Dictionary of English v.0.48

Bighorn \Big"horn`\, n. (Zool.)
   The Rocky Mountain sheep ({Ovis montana} or {Caprovis
   montana}); called also {bighorn sheep}.
   [1913 Webster]

from U.S. Gazetteer (1990)

Bighorn, MT
  Zip code(s): 59010