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The meaning of CRAZY is not mentally sound : marked by thought or action that lacks reason : insane —not used technically. How to use crazy in a sentence.

If you describe someone or something as crazy, you think they are very foolish or strange.

crazy adjective (INTERESTED) [ after noun ] used for saying that someone thinks about something all the time or wants it very much, in a way that some people might think is extreme:

One who is or appears to be mentally deranged: "To them she is not a brusque crazy, but 'appropriately passionate'" (Mary McGrory).

Nov 9, 2025 · crazy (comparative crazier, superlative craziest) Of unsound mind; insane; demented. [from 17th c.] synonym quotations Synonyms: see Thesaurus: insane His ideas …

Definition of crazy adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

There are 17 meanings listed in OED's entry for the adjective crazy, two of which are labelled obsolete, and one of which is considered offensive. See ‘Meaning & use’ for definitions, usage, …

Synonyms for CRAZY: foolish, stupid, silly, mad, absurd, idiotic, irrational, ridiculous; Antonyms of CRAZY: wise, sound, sane, sensible, prudent, reasonable, judicious, clever

" Crazy " is a song written by Willie Nelson and popularized by Patsy Cline in 1961. Nelson wrote the song while living in Houston, working for Pappy Daily 's label D Records.