We found 25 dictionaries that define the word racehorse:

General (21 matching dictionaries)

1. racehorse: Longman Dictionary of Contemporary English
2. racehorse: Merriam-Webster
3. racehorse: Oxford Learner's Dictionaries
4. racehorse: American Heritage Dictionary of the English Language
5. racehorse: Collins English Dictionary
6. racehorse: Vocabulary.com
7. Racehorse, racehorse: Wordnik
8. racehorse: Cambridge Advanced Learner's Dictionary
9. racehorse: Wiktionary
10. racehorse: Webster's New World College Dictionary, 4th Ed.
11. racehorse: The Wordsmyth English Dictionary-Thesaurus
12. racehorse: Infoplease Dictionary
13. racehorse: Dictionary.com
14. racehorse: Cambridge Essential American English Dictionary
15. Racehorse: Wikipedia, the Free Encyclopedia
16. racehorse: Rhymezone
17. racehorse: FreeDictionary.org
18. racehorse: Mnemonic Dictionary
19. racehorse: TheFreeDictionary.com

Computing (1 matching dictionary)

20. racehorse: Encyclopedia

Medicine (1 matching dictionary)

21. racehorse: Medical dictionary

Slang (2 matching dictionaries)

22. racehorse: Green’s Dictionary of Slang
23. racehorse: Urban Dictionary

(Note: See racehorses as well.)

Definitions from Wiktionary ( ) ▸ noun:  A horse that competes in races. Similar: bangtail, race horse, racer, horserace, horse-race, horse race, produce race, showhorse, horse racing, horseracing, more... Phrases: piss like a racehorse, World's Best Racehorse Rankings, racehorse that pulls a sulky, more... Adjectives: thoroughbred, famous, english, great, good, old, fine, young, winning, fastest, successful ▸ Words similar to racehorse ▸ Usage examples for racehorse ▸ Idioms related to racehorse ▸ Wikipedia articles (New!) ▸ Popular adjectives describing racehorse ▸ Words that often appear near racehorse ▸ Rhymes of racehorse ▸ Invented words related to racehorse