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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.
Definition of crazy adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
One who is or appears to be mentally deranged: "To them she is not a brusque crazy, but 'appropriately passionate'" (Mary McGrory).
Crazy can also mean behaving in a strange way esp. because of stress, as if you are mentally ill:
Jan 20, 2026 · Out of control. When she gets on the motorcycle she goes crazy. Very excited or enthusiastic. He went crazy when he won.
to an extreme: We shopped like crazy and bought all our Christmas gifts in one afternoon. Idioms with great speed or recklessness: He drives like crazy once he's out on the highway
Discover everything about the word "CRAZY" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide.
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 defin
Caused by or arising from mental derangement; marked by or manifesting insanity: as, a crazy speech; crazy actions. from the GNU version of the Collaborative International Dictiona