on horseback

1 definition found

on horseback - Collaborative International Dictionary of English v.0.48 :

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