[big-hawrn] 
) -horn. | a wild sheep, Ovis canadensis, of the Rocky Mountains, with large, curving horns. |
[big-hawrn] | a river flowing from central Wyoming to the Yellowstone River in S Montana. 336 mi. (540 km) long. |
| a mountain range in N Wyoming, part of the Rocky Mountains. Highest peak, Cloud Peak, 13,165 ft. (4013 m). |
| big·horn (bĭg'hôrn') n. pl. bighorn or big·horns A wild sheep (Ovis canadensis) of the mountains of western North America, the male of which has massive curved horns. Also called mountain sheep, Rocky Mountain sheep. |