mad

1 of 5

adjective

madder; maddest
1
: arising from, indicative of, or marked by mental disorder
not used technically
2
a
: 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 buffs
a power-mad villain
money-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
maddish adjective

see also mad as a hatter

mad

2 of 5

verb

madded; madding
: madden

mad

3 of 5

noun

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

mad

4 of 5

adverb

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

MAD

5 of 5

abbreviation

mutual assured destruction; mutually assured destruction
Phrases
like mad
: to an extreme degree
spending like mad
working like mad to get the job done on time

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
Recent Examples on the Web
Adjective
Comedians mess up or intentionally break the rules, and After Midnight host Taylor Tomlinson kind of gets mad at them, but mostly everyone, including me, is laughing. David Pierce, The Verge, 31 Mar. 2024 Truss was depicted as mad, or ideologically unreliable, or both. Sam Knight, The New Yorker, 25 Mar. 2024 Madina particularly took issue with Lea, 23, getting mad at her for being nice to Maria, 29, after Sydney Gordon’s elimination. Dana Rose Falcone, Peoplemag, 19 Mar. 2024 Selection Sunday makes for a mad Monday College basketball launched fully into March Madness 2024 as the field for the NCAA Tournaments were announced on Selection Sunday. USA TODAY, 18 Mar. 2024 In one of the maddest storylines of March, Monson’s team did not go quietly in what was supposed to be his final week on the job. Ben Bolch, Los Angeles Times, 17 Mar. 2024 Aside from the long-term preparation and parade day itself, one layer is invisible to the public: the mad scramble by dozens of volunteers to get the festival area ready and the even madder scramble to take it all down. Roxana Popescu, San Diego Union-Tribune, 17 Mar. 2024 Lili Taylor gives a riveting performance as Mary Todd Lincoln, herself driven all but mad by the deaths of Willie and another son, Eddie, in 1850, at age three. Jill Lepore, The New Yorker, 11 Mar. 2024 Ask Amy: My teens are down with this vacation plan, but my wife is mad at me My mother is very excited, too. Amy Dickinson, The Mercury News, 11 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'mad.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

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

First Known Use

Adjective

13th century, in the meaning defined at sense 5

Verb

14th century, in the meaning defined above

Noun

1834, in the meaning defined at sense 1

Adverb

1895, in the meaning defined above

Time Traveler
The first known use of mad was in the 13th century

Dictionary Entries Near mad

Cite this Entry

“Mad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mad. Accessed 13 Apr. 2024.

Kids Definition

mad

adjective
ˈmad
madder; maddest
1
: disordered in mind : insane
2
: done or made without thinking
a mad promise
3
a
: extremely angry : furious
make a bull mad
b
: very displeased
4
: enthusiastic
mad about dancing
5
: affected with rabies : rabid
a mad dog
6
: wildly festive
a mad party
7
: wildly excited : frantic
mad with pain
8
: marked by intense and often chaotic activity
a mad scramble for the ball
madly adverb
madness noun

Medical Definition

mad

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

More from Merriam-Webster on mad

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