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

Another week, another Epic exclusive—and this one, people are really mad about. Hayden Dingman, PCWorld, "This week in games: Borderlands 3 is an Epic exclusive, Obsidian shows off The Outer Worlds," 5 Apr. 2019 Of course, fans were mad about the prospect of Archie Andrews being dead (that means no more abs!). Carolyn Twersky, Seventeen, "All the Best Twitter Reactions to Last Night's "Riverdale" Drama," 17 Jan. 2019 Kirk said Zen knew going in to the Williams licensing deal that some content would need to be changed to accommodate the existing rating and that some people would be mad about that. Kyle Orland, Ars Technica, "Zen Studios alters classic pinball art to protect family-friendly rating [Updated]," 12 Oct. 2018 But not everyone was mad about the latest opening number, with many supporters hailing it as a fun new take on a classic. Megan Friedman, Country Living, "Carrie Underwood Debuted a New ‘Sunday Night Football’ Song and NFL Fans Are Not Happy," 10 Sep. 2018 The video kicked off a mad dash in New York as reporters from the city's tabloid newspapers, the Daily News and New York Post, rushed to confront him about his statements. Eli Rosenberg And Marwa Eltagouri, courant.com, "Lawyer who threatened to call ICE about Spanish speakers is now target of complaint," 18 May 2018 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

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

22 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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