We found 18 dictionaries that define the word river horse:

General (15 matching dictionaries)

1. river horse: Merriam-Webster
2. river horse: American Heritage Dictionary of the English Language
3. river horse: Collins English Dictionary
4. river horse: Vocabulary.com
5. river-horse, river horse: Wordnik
6. river horse: Wiktionary
7. river horse: The Wordsmyth English Dictionary-Thesaurus
8. river horse: Infoplease Dictionary
9. river horse: Dictionary.com
10. River Horse (sculpture), River Horse: Wikipedia, the Free Encyclopedia
11. river horse: Rhymezone
12. river-horse: Webster's 1828 Dictionary
13. river horse: FreeDictionary.org
14. river horse: Mnemonic Dictionary
15. river horse: TheFreeDictionary.com

Computing (1 matching dictionary)

16. river horse: Encyclopedia

Medicine (1 matching dictionary)

17. river horse: Medical dictionary

Slang (1 matching dictionary)

18. river horse: Urban Dictionary

(Note: See river_horses as well.)

Definitions from Wiktionary (river horse) ▸ noun:  (dated) Hippopotamus. Similar: hippopotamus, hippo, hippopotamus amphibius, water elephant, sea-cow, hippopotamid, river hog, common hippopotamus, hippopotamoid, pygmy hippo, more... Opposite: land horse, terrestrial horse, non-aquatic horse Phrases: river horse monster, more... Adjectives: unicorn, hippopotamic, ursine, leonine, taurine, wolflike, tigerlike, bearlike, catlike, rabbitlike, chimpy ▸ Words similar to river horse ▸ Usage examples for river horse ▸ Idioms related to river horse ▸ Wikipedia articles (New!) ▸ Words that often appear near river horse ▸ Rhymes of river horse ▸ Invented words related to river horse