'On horseback' definitions:
Definition of 'On horseback'
From: GCIDE
- Horseback \Horse"back`\, n.
- 1. The back of a horse. [1913 Webster]
- 2. An extended ridge of sand, gravel, and boulders, in a half-stratified condition. --Agassiz. [1913 Webster]
- On horseback, on the back of a horse; mounted or riding on a horse or horses; in the saddle. [1913 Webster]
- The long journey was to be performed on horseback. --Prescott. [1913 Webster]