Dictionary

1mad

adjective \ˈmad\

: very angry

: having or showing severe mental illness

: unable to think in a clear or sensible way

mad·dermad·dest

Full Definition of MAD

1
:  disordered in mind :  insane
2
a :  completely unrestrained by reason and judgment <driven mad by the pain>
b :  incapable of being explained or accounted for <a mad decision>
3
:  carried away by intense anger :  furious <mad about the delay>
4
:  carried away by enthusiasm or desire <mad about horses>
5
:  affected with rabies :  rabid
6
:  marked by wild gaiety and merriment :  hilarious
7
:  intensely excited :  frantic
8
:  marked by intense and often chaotic activity :  wild <a mad scramble>
mad·dish \ˈma-dish\ adjective
like mad
:  to an extreme degree <spending like mad>
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Examples of MAD

  1. If you keep teasing that dog, you'll make him mad.
  2. What are you so mad about?
  3. That guy makes me so mad!
  4. a movie about a mad scientist
  5. She's mad for a cute boy in her class.
  6. He's mad keen on sailing.

Origin of MAD

Middle English medd, madd, from Old English gemǣd, past participle of *gemǣdan to madden, from gemād silly, mad; akin to Old High German gimeit foolish, crazy
First Known Use: before 12th century

Related to MAD

Synonyms
angered, apoplectic, ballistic, cheesed off [chiefly British], choleric, enraged, foaming, fuming, furious, hopping, horn-mad, hot, incensed, indignant, inflamed (also enflamed), infuriate, infuriated, irate, ireful, livid, angry, outraged, rabid, rankled, riled, riley, roiled, shirty [chiefly British], sore, steamed up, steaming, teed off, ticked, wrathful, wroth
Antonyms
angerless, delighted, pleased

Rhymes with MAD

2mad

verb
mad·dedmad·ding

Definition of MAD

:  madden

Examples of MAD

  1. <her endless excuses for not doing the work madded her overburdened coworkers>

First Known Use of MAD

14th century

3mad

noun

MAD

abbreviation

Definition of MAD

mutual assured destruction; mutually assured destruction
LIKE MAD Defined for Kids

mad

adjective \ˈmad\
mad·dermad·dest

Definition of MAD for Kids

1
:  angry <He's mad at his brother.>
2
:  insane 1 <… has the whole world gone mad today? — Christopher Paul Curtis, The Watsons>
3
:  done or made without thinking <a mad promise>
4
:  infatuated <She is mad about horses.>
5
:  having rabies <a mad dog>
6
:  marked by intense and often disorganized activity <At the end of the game, there was a mad scramble.>
mad·ly adverb
mad·ness noun
like mad
:  with a great amount of energy or speed <The crowd cheered like mad.> <He ran like mad.>
Medical Dictionary

mad

adjective \ˈmad\
mad·dermad·dest

Medical Definition of MAD

1
:  arising from, indicative of, or marked by mental disorder
2
:  affected with rabies :  rabid

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