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We found 23 dictionaries with English definitions that include the word wacko:
Click on the first link on a line below to go directly to a page where "wacko" is defined.

General (21 matching dictionaries)

1. wacko: Merriam-Webster.com [home, info]
2. wacko: Oxford Learner's Dictionaries [home, info]
3. wacko: American Heritage Dictionary of the English Language [home, info]
4. wacko: Collins English Dictionary [home, info]
5. wacko: Vocabulary.com [home, info]
6. wacko: Macmillan Dictionary [home, info]
7. Wacko, wacko: Wordnik [home, info]
8. wacko: Cambridge Advanced Learner's Dictionary [home, info]
9. wacko: Wiktionary [home, info]
10. wacko: Webster's New World College Dictionary, 4th Ed. [home, info]
11. wacko: Infoplease Dictionary [home, info]
12. wacko: Dictionary.com [home, info]
13. wacko: Cambridge Dictionary of American English [home, info]
14. Wacko (TV series), Wacko (disambiguation), Wacko (film), Wacko (game), Wacko: Wikipedia, the Free Encyclopedia [home, info]
15. wacko: Rhymezone [home, info]
16. wacko: Free Dictionary [home, info]
17. wacko: Mnemonic Dictionary [home, info]
18. wacko: LookWAYup Translating Dictionary/Thesaurus [home, info]
19. wacko: Dictionary/thesaurus [home, info]

Miscellaneous (1 matching dictionary)

20. WACKO: Acronym Finder [home, info]

Slang (1 matching dictionary)

21. wacko: English slang and colloquialisms used in the United Kingdom [home, info]

(Note: See wackos for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (wacko) ▸ noun:  a person who is regarded as eccentric or mad ▸ Also see wackos ▸ Words similar to wacko ▸ Usage examples for wacko ▸ Idioms related to wacko (New!) ▸ Popular adjectives describing wacko ▸ Words that often appear near wacko ▸ Rhymes of wacko ▸ Invented words related to wacko