mad

adjective
\ 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 combination trivia 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)

: madden

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

The Regency years are the period in British history from 1811, when George III was deemed too mad to rule and the Prince of Wales was made Prince Regent, until 1820, when the Prince Regent became George IV after his father died. Ruth Scurr, WSJ, "‘The Regency Years’ Review: Snobs, Mobs & Madmen," 26 Apr. 2019 That’s what Lauryn had been afraid of—this guy was clearly mad, too. Wesley Snipes, The Root, "Talon of God," 27 May 2018 The mad world of Star Wars memorabilia collecting began with a plea for trust. Alexander Huls, Popular Mechanics, "The Great Star Wars Heist," 7 Mar. 2019 Crash always needs to defeat the mad, chuckling Dr. Frankenstein clone, Dr. Neo Cortex. Harold Goldberg, chicagotribune.com, "Classic games, lovingly reimagined in 'Crash Bandicoot N. Sane Trilogy'," 13 July 2018 But this Sherlock has also been periodically confined to an asylum by her own brother (Sean Fortunato) – reflecting how readily intelligent women then and now are marginalized as mad hysterics. Mike Fischer, Milwaukee Journal Sentinel, "Door County theaters add stories and sparkle to summer nights," 11 July 2018 Director Michal Sulima acknowledges that one of his influences was Werner Herzog’s movie, Fitzcarraldo, about a mad obsession to transport a steamship over the Andes. Stephen Farber, The Hollywood Reporter, "'Piano to Zanskar': Film Review | Edinburgh 2018," 5 July 2018 To prepare for these mad dashes, the center runs year-round. Jordan Cutler-tietjen, sacbee, "Behind the scenes at Music Circus: "The better you are at your job, the less people notice"," 6 July 2018 Instead of getting discouraged after the March defeat, the Friends got mad. Logan Jenkins, sandiegouniontribune.com, "Cliff-hanger update: 3 damsels no longer distressed," 2 July 2018

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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Dictionary Entries near mad

macushla

macuta

macute

mad

MAD

Madagascar

Madagascar bean

Statistics for mad

Last Updated

8 May 2019

Look-up Popularity

Time Traveler for mad

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

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More Definitions for mad

mad

adjective
\ 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

mad

adjective
\ 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

Rhyming Dictionary: Words that rhyme with mad

Thesaurus: All synonyms and antonyms for 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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