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horseback

/ˈhɔɹsˌbæk/ noun

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about horseback at Wordnik → Where our words come from →

  1. The back of a horse.
    They came on horseback across the plains.
  2. A ridge of sand, gravel, and boulders.

adverb

  1. On the back of a horse.

Origin

From Middle English horsebacke, horsebak, horsbak, equivalent to horse + back.

From Wiktionary, via Kaikki.org (CC BY-SA)