Horseback

1. (n.) The back of a horse.

2. (n.) An extended ridge of sand, gravel, and boulders, in a half-stratified condition.

Thesaurus Entries

across, astraddle, astride, by horse, chine, col, comb, esker, hogback, kame, mounted, on, on horseback, ridge, saddle, saddleback, spine, straddle, straddle-legged, straddleback