bighorn-river

noun

1. a river flowing from central Wyoming to the Yellowstone River in S Montana. 336 miles (540 km) long.

noun plural -horns or -horn

1. a large wild sheep, Ovis canadensis, inhabiting mountainous regions in North America and NE Asia: family Bovidae, order Artiodactyla . The male has massive curved horns, and the species is well adapted for climbing and leaping