The meaning of CRAZY is not mentally sound : marked by thought or action that lacks reason : insane —not used technically.

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

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:

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

Crazy definition: mentally unstable or acting irrationally. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "crazy as a soup sandwich", "drive someone crazy", "crazy talk".

Jul 19, 2025 · (informal) Very unexpected; wildly surprising. Near-synonym: amazing The game had a crazy ending.

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 English.

Crazy can be defined as a state or behavior that is highly irrational, unpredictable, or mentally unstable. It often refers to thoughts, actions, or emotions that deviate from commonly perceived norms or standards.

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, …

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