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Definition of mad adjective from the Oxford Advanced American Dictionary

      

    mad

     adjective
    adjective
    NAmE//mæd//
     
    (madder, maddest)
     
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  1. 1[not before noun] mad (at somebody) mad (about something) (informal) very angry He got mad and walked out. She's mad at me for being late. Thesaurusangry
    • mad
    • furious
    • upset
    • indignant
    • irate
    These words all describe people feeling and/or showing anger.
    • angry feeling or showing anger:Please don't be angry with me. Thousands of angry demonstrators filled the square.
    • mad [not before noun] (informal) very angry:He got mad and walked out. She's mad at me for being late.
    • furious extremely angry:He was furious at having been taken out of the game. He was furious with her for ruining the party.
    • upset somewhat angry or annoyed:I was quite upset with him for being late.
    • indignant feeling or showing anger and surprise because you think that you or someone else has been treated unfairly:She was very indignant at the way she had been treated.
    • irate very angry:irate customers an irate letter
    Patterns
    • angry/mad/furious/upset/indignant about/at something
    • angry/furious/upset with somebody (for doing something)
    • angry/mad/furious/upset/indignant that
    • to get angry/mad/furious/upset
    • to make somebody angry/mad/furious
  2. 2done without thought or control; wild and excited The crowd made a mad rush for the exit. Only a mad dash got them to the meeting on time.
  3. 3having a mind that does not work normally; mentally ill They realized that he had gone mad. Inventors are not mad scientists. I'll go mad if I have to wait much longer. She seemed to have gone stark raving mad. A revolver is the only way to stop a mad dog.
  4. 4[not usually before noun] mad (about something/somebody) (informal) liking something or someone very much; very interested in something to be mad about tennis He's always been mad about kids. She's completely power-mad.
  5. 5(informal) very stupid; not at all sensible You must be mad to risk it. It was a mad idea. compare crazy
  6. Idioms
    hopping mad (informal)
     
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    very angry
    like crazy/mad (informal)
     
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    very fast, hard, much, etc. I had to run like mad to catch the bus.
    (as) mad as a hatter/a March hare (informal)
     
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    (of a person) mentally ill; very silly From the Mad Hatter, a character in Lewis Carroll's Alice's Adventures in Wonderland. Because of the chemicals used in hat-making, workers often suffered from mercury poisoning, which can cause loss of memory and damage to the nervous system. A March hare was called mad because of the strange behavior of hares during the mating season.
See mad in the Oxford Advanced Learner's Dictionary