crazy

adjective
cra·​zy | \ ˈkrā-zē How to pronounce crazy (audio) \
crazier; craziest

Definition of crazy

 (Entry 1 of 3)

1a : full of cracks or flaws : unsound … they were very crazy, wretched cabins …— Charles Dickens
b : crooked, askew
2a : not mentally sound : marked by thought or action that lacks reason : insane sense 1b yelling like a crazy man not used technically
b(1) : impractical a crazy plan
(2) : erratic crazy drivers
c : being out of the ordinary : unusual a taste for crazy hats
3a : distracted with desire or excitement a thrill-crazy mob The fans went crazy when their team won the championship.
b : absurdly fond : infatuated He's crazy about the girl.
c : passionately preoccupied : obsessed crazy about boats
like crazy
: to an extreme degree everyone dancing like crazy

crazy

noun
plural crazies

Definition of crazy (Entry 2 of 3)

: one who is or acts crazy especially : such a one associated with a radical or extremist political cause … are convinced that Wilson thinks they're rubes, bumpkins, or crazies, and wants to replace them with a legislature full of moderate clones of himself. — Fred Barnes

crazy

adverb

Definition of crazy (Entry 3 of 3)

: extremely, wildly crazy good

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Other Words from crazy

Adjective

crazily \ ˈkrā-​zə-​lē How to pronounce crazily (audio) \ adverb
craziness \ ˈkrā-​zē-​nəs How to pronounce craziness (audio) \ noun

Synonyms & Antonyms for crazy

Synonyms: Adjective

absurd, bizarre, fanciful, fantastic (also fantastical), foolish, insane, nonsensical, preposterous, unreal, wild

Synonyms: Noun

bug, crackbrain, fool, fruitcake, head case, loon, loony, lunatic, maniac, nut, nutcase, nutter [British slang], psycho, psychopath, sickie, sicko, wacko (also whacko)

Antonyms: Adjective

realistic, reasonable

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Examples of crazy in a Sentence

Adjective

He's been acting kind of crazy lately. There are a lot of crazy drivers on the streets. You are crazy to have paid so much for this car. You would be crazy not to accept their offer! What a crazy thing to do!

Noun

A bunch of crazies live there. one unsympathetic homeowner insisted that all homeless people are crazies

Adverb

I bought some crazy good stuff there.
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Recent Examples on the Web: Adjective

Any room with Lenny and Jason and Denzel in it, well… was crazy and insane. Peter Mikelbank, PEOPLE.com, "Zoë Kravitz Gets Married to Karl Glusman at Her Dad Lenny Kravitz's Paris Home," 29 June 2019 Sinuous sea horses, leaping dolphins, and mythological sea critters might together seem crazy, but there’s a method to the madness. Brian T. Allen, National Review, "Silver Sailing Cups Recall Gilded Age Glamour and Sexuality," 29 June 2019 Nike When Nike’s SNKRS app trips up, rabid sneaker fans go crazy. Marc Bain, Quartzy, "Nike’s app for sneakerheads is fueling its digital business," 28 June 2019 Rupp made several comments to police that her son was driving her crazy and stealing her money. Aubrey Carpenter, azcentral, "Woman who left son at Peoria McDonald's while gambling allowed contact with son," 24 June 2019 The crazy part: All four subs are in the Mississippi River. Mike Scott, nola.com, "‘Voodoo City,’ Episode 10: New Orleans’ Nazi problem," 24 June 2019 The teacher taps into the funniest, craziest and most frustrating parts of the profession. David Lindquist, Indianapolis Star, "Hocus Pocus' Kathy Najimy and MasterChef Junior are on Butler Arts Center's new season," 19 June 2019 Or about how his companion, Rosario Murillo, has acquired all the eccentricities of a dictator’s wife—the crappy poetry readings, the spiritual séances, the crazy makeup, the offering of her own daughter for her husband’s bed. Alma Guillermoprieto, The New York Review of Books, "A Reporting Life in Latin America," 6 June 2019 Instagrammer Sofie Petersen gave just raised the bar for crazy eyelashes. Christina Oehler, Health.com, "Curly Eyelash Extensions Are the Horrifying New Beauty Trend You Never Asked For," 6 June 2019

Recent Examples on the Web: Noun

Featuring a naked Braxton with just a sheet draped over her crotch, Daniela Federici’s photos drove the public crazy while the story was supposed to be nonfiction erotica, to bring out the sexuality from the soulful church girl. Michael Gonzales, Longreads, "It’s Like That: The Makings of a Hip-Hop Writer," 10 June 2019 Razing Columbine is nothing short of surrender to the hatred of the bullies and crazies of the world. Tearing down a shining light to create darkness and erase the memory of the innocent victims is insanity. Dp Opinion, The Denver Post, "Letters: Columbine High School’s future; A vote to diminish your vote; Artistic interpretation (6/12/19)," 12 June 2019 One party states who are trying to appeal the most radical crazies in their party. Fox News, "Reps. Meadows, Jordan call on Rosenstein to testify," 27 Sep. 2018 Local governments have gone tax crazy in a place once known as one of the most fiscally conservative urban counties in America. Jason Williams, Cincinnati.com, "PX column: What's up with the barrage of tax hikes in Cincinnati and Hamilton County?," 28 June 2018 As a little girl, Jerisha Fabian typically had Barbies afflicted with some crazy made up medical condition. Karen Pilarski, Milwaukee Journal Sentinel, "Fueled by a passion for nursing that started with her Barbies, she fought through teen pregnancy on her way to getting degree," 26 June 2018 This is big news in a region where Chick-Fil-A has a cult following of fast food crazies known for throwing street parties when new locations open up, according to Nation's Restaurant News. Mark Price, charlotteobserver, "Chick-fil-A fans jubilant as chain uses Charlotte as one of two test cities for new item | Charlotte Observer," 25 May 2018 China and Europe aren't as crossover crazy as Americans. Phoebe Wall Howard, USA TODAY, "Ford Focus gets new look, more room and tech," 10 Apr. 2018 The FloTrack crazies recap a wild list of happenings at this year's NCAA Indoor Championships. Ken Goe, OregonLive.com, "Galen Rupp dominates; when a world record isn't a world record: Oregon track & field rundown," 11 Mar. 2018

Recent Examples on the Web: Adverb

While everyone is going crazy over the deals at Amazon for Prime Day right now, Newegg is sneaking through the back door of the bargain basement with its FantasTech sale. Ian Paul, PCWorld, "Forget Amazon Prime Day, Newegg's got two great deals on FreeSync displays right now," 17 July 2018 The Fake News is going crazy making up false stories and using only unnamed sources (who don’t exist). Ryan Teague Beckwith, Time, "Read the 191 Arguments President Trump Has Made Against the Mueller Investigation," 7 June 2018 The Fake News is going crazy making up false stories and using only unnamed sources (who don’t exist). Ryan Teague Beckwith, Time, "Read the 191 Arguments President Trump Has Made Against the Mueller Investigation," 7 June 2018 The Fake News is going crazy making up false stories and using only unnamed sources (who don’t exist). Ryan Teague Beckwith, Time, "Read the 191 Arguments President Trump Has Made Against the Mueller Investigation," 7 June 2018 The Fake News is going crazy making up false stories and using only unnamed sources (who don’t exist). Ryan Teague Beckwith, Time, "Read the 191 Arguments President Trump Has Made Against the Mueller Investigation," 7 June 2018 The Fake News is going crazy making up false stories and using only unnamed sources (who don’t exist). Ryan Teague Beckwith, Time, "Read the 191 Arguments President Trump Has Made Against the Mueller Investigation," 7 June 2018 The Fake News is going crazy making up false stories and using only unnamed sources (who don’t exist). Ryan Teague Beckwith, Time, "Read the 191 Arguments President Trump Has Made Against the Mueller Investigation," 7 June 2018 The amount of money the TV industry, its advertisers and fans spend on the tournament are pretty crazy too. Peter Dawson, star-telegram, "Texas forward Mohamed Bamba declares for the NBA Draft | Fort Worth Star-Telegram," 20 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'crazy.' 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 crazy

Adjective

1566, in the meaning defined at sense 1a

Noun

1867, in the meaning defined above

Adverb

1887, in the meaning defined above

History and Etymology for crazy

Adjective

see craze entry 1

Noun

see craze entry 1

Adverb

see craze entry 1

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Statistics for crazy

Last Updated

5 Jul 2019

Look-up Popularity

Time Traveler for crazy

The first known use of crazy was in 1566

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More Definitions for crazy

crazy

adjective

English Language Learners Definition of crazy

 (Entry 1 of 3)

usually offensive : having or showing severe mental illness
: unable to think in a clear or sensible way
: wild and uncontrolled

crazy

noun

English Language Learners Definition of crazy (Entry 2 of 3)

chiefly US, informal : a person who is crazy

crazy

adverb

English Language Learners Definition of crazy (Entry 3 of 3)

US, informal : very or extremely

crazy

adjective
cra·​zy | \ ˈkrā-zē How to pronounce crazy (audio) \
crazier; craziest

Kids Definition of crazy

1 : having a severe mental illness : insane
2 : not sensible or logical a crazy idea
3 : very excited or pleased They're crazy about their new house.
4 : very annoyed This song makes me crazy.

Other Words from crazy

crazily \ ˈkrā-​zə-​lē \ adverb
craziness \ -​zē-​nəs \ noun

crazy

adjective
cra·​zy | \ ˈkrā-zē How to pronounce crazy (audio) \
crazier; craziest

Medical Definition of crazy

: marked by a severely disordered state of mind not used technically

Other Words from crazy

crazily \ -​zə-​lē How to pronounce crazily (audio) \ adverb
craziness \ -​zē-​nəs How to pronounce craziness (audio) \ noun

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More from Merriam-Webster on crazy

Rhyming Dictionary: Words that rhyme with crazy

Thesaurus: All synonyms and antonyms for crazy

Spanish Central: Translation of crazy

Nglish: Translation of crazy for Spanish Speakers

Britannica English: Translation of crazy for Arabic Speakers

Comments on crazy

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