The meaning of MAD is arising from, indicative of, or marked by mental disorder —not used technically. How to use mad in a sentence.

mad adjective (WANTING) [ after noun ] used for saying that someone wants something very much or thinks about something all the time, in a way that might make them willing to do immoral or extreme …

MAD definition: mentally disturbed; deranged; insane; demented. See examples of mad used in a sentence.

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1. Wildly; impetuously: drove like mad. 2. To an intense degree or great extent: worked like mad; snowing like mad.

Jan 31, 2026 · In the United States and Canada, the word mad refers to anger much more often than insanity, but such usage is still considered informal by some speakers and labeled as such even in …

Mad, crazy, insane are used to characterize wildly impractical or foolish ideas, actions, etc. Mad suggests senselessness and excess: The scheme of buying the bridge was absolutely mad.

If you're mad about something, you've lost your temper. If you've gone mad, you've lost your mind. Just like it's more common to be angry than to be insane, you're more likely to use mad to describe …

If you say that someone is mad, you mean that they are very angry. You're just mad at me because I don't want to go. You use mad to describe people or things that you think are very foolish. You'd be …

Definition of mad adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.