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We found 44 dictionaries with English definitions that include the word whack:
Click on the first link on a line below to go directly to a page where "whack" is defined.

General (31 matching dictionaries)

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

Business (1 matching dictionary)

30. whack: Legal dictionary [home, info]

Computing (5 matching dictionaries)

31. whack: Free On-line Dictionary of Computing [home, info]
32. whack: Netlingo [home, info]
33. whack: CCI Computer [home, info]
34. whack: Webopedia [home, info]
35. whack: Encyclopedia [home, info]

Medicine (1 matching dictionary)

36. whack: online medical dictionary [home, info]

Miscellaneous (2 matching dictionaries)

37. WHACK: Ka-BOOM! Comicbook Words on Historical Principles [home, info]
38. whack: Idioms [home, info]

Slang (4 matching dictionaries)

39. whack: English slang and colloquialisms used in the United Kingdom [home, info]
40. whack: Colloquial Speech of Carleton County, New Brunswick, Canada [home, info]
41. Whack: Street Terms: Drugs and the Drug Trade [home, info]
42. WHACK: Urban Dictionary [home, info]

(Note: See whacks for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (whack) ▸ noun:  the sound made by a sharp swift blow ▸ noun:  the act of hitting vigorously ("He gave the table a whack") ▸ verb:  hit hard ("The teacher whacked the boy") ▸ name:  A surname (very rare: popularity rank in the U.S.: #48675) ▸ Also see whacks ▸ Word origin ▸ Words similar to whack ▸ Usage examples for whack ▸ Popular adjectives describing whack ▸ Words that often appear near whack ▸ Rhymes of whack ▸ Invented words related to whack