\ ˈmad How to pronounce mad (audio) \
madder; maddest

Definition of mad

 (Entry 1 of 5)

1 : arising from, indicative of, or marked by mental disorder not used technically
2a : completely unrestrained by reason and judgment : unable to think in a clear or sensible way driven mad by the pain mad with jealousy
b : incapable of being explained or accounted for a mad decision
3 informal : intensely angry or displeased What are you so mad about? Everyone was mad about the delay. That kind of behavior really gets me mad. I'm so mad I could spit.
4 : carried away by enthusiasm or desire : extremely or excessively fond of or enthusiastic about something or someone mad about horses … there is a nouveau riche demographic mad for diamonds and Lamborghinis …— Kevin D. Williamson often used in combinationtrivia known to only the most movie-mad film buffsa power-mad villainmoney-mad
5 : affected with rabies : rabid a mad dog
6 : marked by wild gaiety and merriment : hilarious of their childhood, of the mad pranks they played— Winston Churchill
7 : intensely excited : frantic driving him mad with jealousy— Edmund Wilson
8 : marked by intense and often chaotic activity : wild a mad scramble
9 US, informal : great in quantity, amount, extent, or degree making mad money Her performance won her mad respect from fans and peers alike, but the media response was tempered at best.— Joan Morgan
like mad
: to an extreme degree spending like mad working like mad to get the job done on time

mad

verb
madded; madding

Definition of mad (Entry 2 of 5)

mad

noun

Definition of mad (Entry 3 of 5)

1 : a fit or mood of bad temper
2 : anger, fury

mad

adverb

Definition of mad (Entry 4 of 5)

informal
: very, extremely We were mad tight, many of us born and raised in this same spot.— Sister Souljah

Definition of MAD (Entry 5 of 5)

mutual assured destruction; mutually assured destruction

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Other Words from mad

Adjective

maddish \ ˈma-​dish How to pronounce maddish (audio) \ adjective

Examples of mad in a Sentence

Adjective If you keep teasing that dog, you'll make him mad. What are you so mad about? That guy makes me so mad! a movie about a mad scientist She's mad for a cute boy in her class. He's mad keen on sailing. Verb her endless excuses for not doing the work madded her overburdened coworkers Noun watch out, the boss has got a bit of a mad on just now
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Recent Examples on the Web: Adjective As a malcontent, Saul tends toward a policy of not so much getting mad about anything in particular as of getting even across the board. Peter Schjeldahl, The New Yorker, "The In-Your-Face Paintings of Peter Saul," 10 Feb. 2020 The finale features a blurring of two events separated by multiple years that made me briefly, but actively, mad. Daniel Fienberg, The Hollywood Reporter, "'Manhunt: Deadly Games': TV Review," 3 Feb. 2020 The team was owned by Tony Morabito, the son of an Italian immigrant and a denizen of sports-mad North Beach. Bruce Jenkins, San Francisco Chronicle, "History of the 49ers," 30 Jan. 2020 The was soon the scene of a mad scramble for survival. Francine Uenuma, Smithsonian Magazine, "The Deadliest Disaster at Sea Killed Thousands Yet Its Story Is Little-Known. Why?," 29 Jan. 2020 That may sound mad, but Slavia Prague were outstanding. SI.com, "Slavia Prague 1-2 Barcelona: Report, Ratings & Reaction as La Blaugrana Scrape Lucky Win," 23 Oct. 2019 In the living room, the 1989 film played on a boxy TV, the sound off to prevent the tour guides from going mad. Washington Post, "On the tourist trail in Iowa," 16 Jan. 2020 The move is fairly common among the royal houses of Europe and has happened frequently across the centuries to continue royal power should a monarch fall ill — or, in the case of George III of England, go mad. Phil Boucher, PEOPLE.com, "Crown Prince Haakon of Norway Becomes Regent After King Harald Falls Sick," 19 Dec. 2019 Their 9-0 loss to Leicester City really was something special and, of course, the internet went mad for it all. SI.com, "LOL: The Best Memes & Funnies From the Premier League This Week," 30 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mad.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of mad

Adjective

before the 12th century, in the meaning defined at sense 1

Verb

14th century, in the meaning defined above

Noun

1834, in the meaning defined at sense 1

Adverb

1895, in the meaning defined above

History and Etymology for mad

Adjective, Verb, and Noun

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

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Time Traveler for mad

Time Traveler

The first known use of mad was before the 12th century

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Statistics for mad

Last Updated

13 Feb 2020

Cite this Entry

“Mad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mads. Accessed 17 Feb. 2020.

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More Definitions for mad

\ ˈmad How to pronounce mad (audio) \
madder; maddest

Kids Definition of mad

1 : angry He's mad at his brother.
2 : insane sense 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.
like mad
: with a great amount of energy or speed The crowd cheered like mad. He ran like mad.

Other Words from mad

madly adverb
madness noun
\ ˈmad How to pronounce mad (audio) \
madder; maddest

Medical Definition of mad

1 : arising from, indicative of, or marked by mental disorder not used technically
2 : affected with rabies : rabid

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More from Merriam-Webster on mad

Thesaurus: All synonyms and antonyms for mad

Rhyming Dictionary: Words that rhyme with mad

Spanish Central: Translation of mad

Nglish: Translation of mad for Spanish Speakers

Britannica English: Translation of mad for Arabic Speakers

Comments on mad

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