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.

CRAZY definition: 1. stupid or not reasonable: 2. mentally ill: 3. annoyed or angry: . Learn more.

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

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

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

Sep 21, 2025 · Out of control. When she gets on the motorcycle she goes crazy. Very excited or enthusiastic. quotations He went crazy when he won.

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, …

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 Dictionary of …

Crazy definition: mentally deranged; demented; insane.. See examples of CRAZY used in a sentence.

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