We found 43 dictionaries that define the word fun:

General (29 matching dictionaries)

1. fun: Merriam-Webster
2. fun: Oxford Learner's Dictionaries
3. fun: American Heritage Dictionary of the English Language
4. fun: Collins English Dictionary
5. fun: Vocabulary.com
6. Fun, fun: Wordnik
7. fun: Cambridge Advanced Learner's Dictionary
8. fun: Wiktionary
9. fun: Webster's New World College Dictionary, 4th Ed.
10. fun: The Wordsmyth English Dictionary-Thesaurus
11. fun: Infoplease Dictionary
12. fun: Dictionary.com
13. fun: Online Etymology Dictionary
14. fun: Cambridge Essential American English Dictionary
15. FUN, Fun. (band), Fun (Blondie song), Fun (Coldplay song), Fun (Garth Brooks album), Fun (Pitbull song), Fun (album), Fun (band), Fun (disambiguation), Fun (film), Fun (magazine), Fun: Wikipedia, the Free Encyclopedia
16. Fun: Online Plain Text English Dictionary
17. fun: Webster's Revised Unabridged, 1913 Edition
18. fun: Rhymezone
19. fun: AllWords.com Multi-Lingual Dictionary
20. fun: Webster's 1828 Dictionary
21. fun: Stammtisch Beau Fleuve Acronyms
22. Fun: Dictionary of Phrase and Fable (1898)
23. fun: FreeDictionary.org
24. fun: Mnemonic Dictionary
25. fun: TheFreeDictionary.com
26. fun: Wikimedia Commons US English Pronunciations
27. fun: Longman Dictionary of Contemporary English

Art (2 matching dictionaries)

28. Fun: Cooking Dictionary
29. fun-: A Cross Reference of Latin and Greek Elements

Business (1 matching dictionary)

30. fun: Legal dictionary

Computing (2 matching dictionaries)

31. Fun: Free On-line Dictionary of Computing
32. Fun: Encyclopedia

Medicine (1 matching dictionary)

33. online medical dictionary (No longer online)

Miscellaneous (4 matching dictionaries)

34. FUN: Acronym Finder
35. FUN: Three Letter Words with definitions
36. AbbreviationZ (No longer online)
37. fun: Idioms

Slang (2 matching dictionaries)

38. fun, fun, fun, fun: Green’s Dictionary of Slang
39. F.U.N, Fun, The fun, f'un, f.u.n, fun: Urban Dictionary

Sports (1 matching dictionary)

40. Fun: Croquet

Tech (1 matching dictionary)

41. Sweetwater Music (No longer online)

(Note: See funing as well.)

Definitions from Wiktionary ( ) ▸ noun:  Amusement, enjoyment or pleasure. ▸ noun:  Playful, often noisy, activity. ▸ adjective:  Enjoyable or amusing. ▸ adjective:  (informal) Whimsical or flamboyant. ▸ verb:  (colloquial) To tease, kid, poke fun at, make fun of. Similar: merriment, amusing, entertaining, playfulness, play, sport, diverting, laugh, enjoyment, thrill, more... Opposite: boring, tedious, dull, monotonous, dreary Types: amusing, enjoyable, pleasurable, thrilling, exciting, entertaining, more... Phrases: have fun, for fun, having fun, make fun, making fun, more... Adjectives: much, great, good, such, little, real, clean, pure, sheer, plain, innocent Colors:     yellow,     pink,     turquoise,     lime green,     orange, more... ▸ Word origin ▸ Words similar to fun ▸ Usage examples for fun ▸ Idioms related to fun ▸ Wikipedia articles (New!) ▸ Popular adjectives describing fun ▸ Popular nouns described by fun ▸ Words that often appear near fun ▸ Rhymes of fun ▸ Invented words related to fun