Definition of "ahorse" []

• On the back of a horse; on horseback. (adverb)

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• "Fortunately, even though I have ran into lots of bears in the past 27 years, none chose to do anything but stand still or leave whether I was afoot or ahorse."
• "It is customary to begin this sort of fight ahorse."
• "Khal Drogo, far ahead and ahorse, leads his khalasar into the rising sun."