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We found 51 dictionaries with English definitions that include the word oak:
Click on the first link on a line below to go directly to a page where "oak" is defined.

General (34 matching dictionaries)

1. oak: Merriam-Webster.com [home, info]
2. oak: Oxford Learner's Dictionaries [home, info]
3. oak: American Heritage Dictionary of the English Language [home, info]
4. oak: Collins English Dictionary [home, info]
5. oak: Vocabulary.com [home, info]
6. oak: Macmillan Dictionary [home, info]
7. Oak, oak: Wordnik [home, info]
8. oak: Cambridge Advanced Learner's Dictionary [home, info]
9. OAK, oak: Wiktionary [home, info]
10. oak: Webster's New World College Dictionary, 4th Ed. [home, info]
11. oak: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. oak: Infoplease Dictionary [home, info]
13. OAK: Dictionary.com [home, info]
14. oak: Online Etymology Dictionary [home, info]
15. Oak, oak: UltraLingua English Dictionary [home, info]
16. oak: Cambridge Dictionary of American English [home, info]
17. OAK, Oak (band), Oak (disambiguation), Oak (flavoured milk), Oak (programming language), Oak (wine), Oak (wood), Oak, The Oak: Wikipedia, the Free Encyclopedia [home, info]
18. Oak: Online Plain Text English Dictionary [home, info]
19. oak: Webster's Revised Unabridged, 1913 Edition [home, info]
20. oak: Rhymezone [home, info]
21. oak: AllWords.com Multi-Lingual Dictionary [home, info]
22. oak: Webster's 1828 Dictionary [home, info]
23. Oak: E Cobham Brewer, The Reader's Handbook [home, info]
24. Oak: Dictionary of Phrase and Fable (1898) [home, info]
25. Oak: Encarta® Online Encyclopedia, North American Edition [home, info]
26. Oak: 1911 edition of the Encyclopedia Britannica [home, info]
27. oak: Free Dictionary [home, info]
28. oak: Mnemonic Dictionary [home, info]
29. oak: WordNet 1.7 Vocabulary Helper [home, info]
30. oak: LookWAYup Translating Dictionary/Thesaurus [home, info]
31. oak: Dictionary/thesaurus [home, info]
32. oak: Wikimedia Commons US English Pronunciations [home, info]

Art (3 matching dictionaries)

33. Oak: Epicurus.com Wine Glossary [home, info]
34. Oak: Natural Magick [home, info]
35. Oak: Dictionary of Symbolism [home, info]

Computing (1 matching dictionary)

36. oak: Encyclopedia [home, info]

Medicine (3 matching dictionaries)

37. oak: online medical dictionary [home, info]
38. Oak: Allergy Glossary [home, info]
39. oak: Medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

40. OAK: Acronym Finder [home, info]
41. OAK: Three Letter Words with definitions [home, info]
42. OAK: AbbreviationZ [home, info]
43. oak: Idioms [home, info]

Religion (2 matching dictionaries)

44. Oak: Easton Bible [home, info]
45. Oak: Smith's Bible Dictionary [home, info]

Science (2 matching dictionaries)

46. oak: Environmental Terminology Discovery Service [home, info]
47. Oak: Garden Flower, Shrub and Tree Glossary [home, info]

Slang (1 matching dictionary)

48. Oak, Oak: Urban Dictionary [home, info]

Tech (1 matching dictionary)

49. oak: Book Binding [home, info]

(Note: See oaks for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (oak) ▸ noun:  a deciduous tree of the genus Quercus; has acorns and lobed leaves ("Great oaks grow from little acorns") ▸ noun:  the hard durable wood of any oak; used especially for furniture and flooring ▸ name:  A surname (very rare: popularity rank in the U.S.: #61507) ▸ Also see oaks ▸ Word origin ▸ Words similar to oak ▸ Usage examples for oak ▸ Idioms related to oak (New!) ▸ Popular adjectives describing oak ▸ Words that often appear near oak ▸ Rhymes of oak ▸ Invented words related to oak