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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.

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

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

8 senses: informal 1. foolish or irrational 2. wildly excited; out of control 3. fantastic; strange; ridiculous 4. outrageous;.... Click for more definitions.

Define crazy. crazy synonyms, crazy pronunciation, crazy translation, English dictionary definition of crazy. adj. cra·zi·er , cra·zi·est 1. a. Mentally deranged. b. Informal Odd or eccentric in behavior. 2. …

Dec 14, 2025 · crazy (comparative crazier, superlative craziest) Of unsound mind; insane; demented. [from 17th c.] synonym quotations Synonyms: see Thesaurus: insane His ideas were both frightening …

lampbane crazy "I go crazy, crazy, baby, I go crazy August 29, 2008 pterodactyl crazy I've been watching in fascination as this word acquires a new meaning. It's now in common use as a synonym …

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

Use the adjective crazy to describe actions that aren't sensible, like the crazy way your brothers run around the house when their favorite team wins a game.