| n. | 1. | The back of a horse. | |||
| 2. | An extended ridge of sand, gravel, and boulders, in a half-stratified condition.
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| Noun | 1. | horseback - the back of a horse |
| 2. | horseback - a narrow ridge of hills Synonyms: hogback | |
| Adv. | 1. | horseback - on the back of a horse; "he rode horseback to town"; "managed to escape ahorse"; "policeman patrolled the streets ahorseback" Synonyms: ahorse, ahorseback |