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We found 47 dictionaries with English definitions that include the word Adult:
Click on the first link on a line below to go directly to a page where "Adult" is defined.

General (30 matching dictionaries)

1. adult: Merriam-Webster.com [home, info]
2. adult: Oxford Learner's Dictionaries [home, info]
3. adult: American Heritage Dictionary of the English Language [home, info]
4. adult: Collins English Dictionary [home, info]
5. adult: Vocabulary.com [home, info]
6. adult, adult: Macmillan Dictionary [home, info]
7. adult: Wordnik [home, info]
8. adult: Cambridge Advanced Learner's Dictionary [home, info]
9. adult: Wiktionary [home, info]
10. adult: Webster's New World College Dictionary, 4th Ed. [home, info]
11. adult: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. adult: Infoplease Dictionary [home, info]
13. adult: Dictionary.com [home, info]
14. adult (adj.): Online Etymology Dictionary [home, info]
15. adult: UltraLingua English Dictionary [home, info]
16. adult: Cambridge Dictionary of American English [home, info]
17. .ADULT, ADULT, Adult (album), Adult (band), Adult (magazine), Adult, .adult: Wikipedia, the Free Encyclopedia [home, info]
18. Adult: Online Plain Text English Dictionary [home, info]
19. adult: Webster's Revised Unabridged, 1913 Edition [home, info]
20. adult: Rhymezone [home, info]
21. adult: AllWords.com Multi-Lingual Dictionary [home, info]
22. adult: Webster's 1828 Dictionary [home, info]
23. adult: Free Dictionary [home, info]
24. adult: Mnemonic Dictionary [home, info]
25. adult: WordNet 1.7 Vocabulary Helper [home, info]
26. adult: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. adult: Dictionary/thesaurus [home, info]
28. adult: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

29. adult: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (9 matching dictionaries)

30. Adult: MoneyGlossary.com [home, info]
31. adult: Webster's New World Law Dictionary [home, info]
32. adult: Everybody's Legal Dictionary [home, info]
33. adult: Glossary of Legal Terms [home, info]
34. Adult: A DICTIONARY OF LAW (1893) [home, info]
35. ADULT: Bouvier's Law Dictionary 1856 Edition [home, info]
36. adult: Legal dictionary [home, info]
37. adult: Financial dictionary [home, info]
38. adult: BusinessDictionary.com [home, info]

Computing (1 matching dictionary)

39. adult: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

40. Adult: Medical Dictionary [home, info]
41. adult: online medical dictionary [home, info]
42. adult: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

43. ADULT: Acronym Finder [home, info]

Science (2 matching dictionaries)

44. Adult: Bird On! [home, info]
45. adult: Natural History Terms [home, info]

(Note: See adults for more definitions.)

Quick definitions from WordNet (adult) ▸ noun:  any mature animal ▸ noun:  a fully developed person from maturity onward ▸ adjective:  (of animals) fully developed ("An adult animal") ▸ Also see adults ▸ Word origin ▸ Words similar to Adult ▸ Usage examples for Adult ▸ Idioms related to Adult (New!) ▸ Popular adjectives describing Adult ▸ Popular nouns described by Adult ▸ Words that often appear near Adult ▸ Rhymes of Adult ▸ Invented words related to Adult