We found 23 dictionaries that define the word whacker:

General (14 matching dictionaries)

1. whacker: Merriam-Webster
2. whacker: Oxford Learner's Dictionaries
3. whacker: Collins English Dictionary
4. whacker: Vocabulary.com
5. Whacker, whacker: Wordnik
6. whacker: Wiktionary
7. whacker: Dictionary.com
8. Whacker: Online Plain Text English Dictionary
9. whacker: Webster's Revised Unabridged, 1913 Edition
10. whacker: Rhymezone
11. Whacker: AllWords.com Multi-Lingual Dictionary
12. whacker: FreeDictionary.org
13. whacker: Mnemonic Dictionary
14. Whacker: TheFreeDictionary.com

Business (1 matching dictionary)

15. whacker: Legal dictionary

Computing (3 matching dictionaries)

16. whacker: Free On-line Dictionary of Computing
17. whacker: CCI Computer
18. whacker: Encyclopedia

Medicine (1 matching dictionary)

19. online medical dictionary (No longer online)

Miscellaneous (2 matching dictionaries)

20. WHACKER, WHACKER, WHACKER: Terminology and Descriptions of Geneaological Words
21. whacker: Idioms

Slang (2 matching dictionaries)

22. whacker, whacker, whacker, whacker, whacker: Green’s Dictionary of Slang
23. whacker: Urban Dictionary

(Note: See whack as well.)

Definitions from Wiktionary (whacker) ▸ noun:  One who, or something which, whacks. ▸ noun:  (informal) Synonym of whopper (“anything large”) ▸ noun:  (informal) Synonym of whopper (“an outrageous or blatant lie”) Similar: whopper, googlewhacker, dickwhacker, whaler, hacker, thwackee, whapper, whack job, whackjob, waacker, more... Opposite: non-whacker, anti-whacker, pacifist Phrases: weed whacker, Packer whacker, more... Adjectives: weed, old, lily, bush, such, mule, real, frightful, powered, reckless, american ▸ Words similar to whacker ▸ Usage examples for whacker ▸ Idioms related to whacker ▸ Wikipedia articles (New!) ▸ Popular adjectives describing whacker ▸ Words that often appear near whacker ▸ Rhymes of whacker ▸ Invented words related to whacker