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racehorse

[reys-hawrs]
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noun
  1. a horse bred or kept for racing, especially in flat races or steeplechases.

Origin of racehorse

First recorded in 1620–30; race1 + horse
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for racehorse

racehorse

noun
  1. a horse specially bred for racing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012