/ Dictionary / Index R racehorse: Meaning and Definition of Find definitions for: race•horse Pronunciation: (rās'hôrs"), [key] — n. a horse bred or kept for racing, esp. in flat races or steeplechases. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: racehorse (Thesaurus) racecourse racemate Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language