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
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

Keep scrolling for more

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

Synonyms: Noun

Antonyms: Adjective

Visit the Thesaurus for More 

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.
See More
Recent Examples on the Web: Adjective For the stir-crazy, his trip is a consoling reminder of travel’s hazards. The Economist, "Home Entertainment Chekhov’s trip to Sakhalin puts lockdown in perspective," 4 July 2020 Instead of becoming stir crazy and risking exposure to COVID-19 by going outside, Davis stayed inside and mastered Call of Duty and NBA 2K. Mark Medina, USA TODAY, "Anthony Davis says he's '100 percent healthy,' Lakers' title chances higher after hiatus," 3 July 2020 By some crazy, random twist of fate, seasoned soccer fans in Birmingham, England, have started pulling for Birmingham Legion FC in Alabama. Joseph Goodman | Jgoodman@al.com, al, "Birmingham Legion FC lands heated rival Memphis for first game," 2 July 2020 The latest version of the 5G technical specifications, expected Friday, adds features for connecting autonomous cars, intelligent factories, and internet-of-things devices to crazy-fast 5G networks. Will Knight, Wired, "5G Was Going to Unite the World—Instead It's Tearing Us Apart," 2 July 2020 Yet there’s an ecstatic feeling of new discovery running throughout Harley Quinn, a snarly upending of the Caped Crusader mythos that blends gory parody with brainy satire and a surprisingly sweet depiction of crazy love. Kristen Baldwin, EW.com, "The best TV shows of 2020… so far," 1 July 2020 To just about all of us who live in a world without co-pays and silver/gold/platinum plans, almost everything about the U.S. healthcare system seems capricious, crazy and cruel. Bernhard Warner, Fortune, "China passes its contentious new security law, rattling global investors," 30 June 2020 Watch a tendency to spend money on wild and crazy fads. oregonlive, "Horoscope for June 30, 2020: Cancer, careful of unrealistic expectations; Libra, expect positive attention today," 30 June 2020 Let your kids go crazy decorating their bikes or wagons and parade through the neighborhood. Amy Schwabe, Milwaukee Journal Sentinel, "No fireworks, parades or community gatherings? Here's what your family can do on the 4th of July instead.," 27 June 2020 Recent Examples on the Web: Noun The campus crazies demanding safe spaces seem to have polluted the entire culture with fear and anxiety. Brian T. Allen, National Review, "COVID Cash for the Arts: Where to Start," 2 May 2020 Doyle’s message to stir-crazy, nature-seeking folks: Feel free to hike and enjoy the great outdoors. Ron Kroichick, SFChronicle.com, "Coronavirus challenge: Warm weather lures Bay Area residents to region’s parks," 25 Apr. 2020 There are four types of winter drivers: plodders, joggers, speeders and crazies. cleveland, "Big Volkswagen Atlas shrugs off the snow," 8 Feb. 2020 There are a lot of crazies in the city and a lot of bad guys. Carl Nolte, SFChronicle.com, "Wanna get to really know San Francisco? Ride Muni," 11 Jan. 2020 The Crimson Tide’s student section under first-year coach Nate Oats doesn’t have a catchy new nickname yet, but the hardhat wearing Crimson crazies showed up in force for the home team’s gritty 77-74 victory against Kansas State. Joseph Goodman | Jgoodman@al.com, al, "Bring the noise: Alabama’s students beginning to rival Auburn’s ‘Jungle’," 28 Jan. 2020 Please don’t engage with the crazies in the comments. Christina Oehler, Health.com, "Katie Sturino Claps Back at Trolls Who Shamed Both Her and Meghan Markle’s Bodies," 15 Nov. 2019 Players marveled at the crowd’s enthusiasm after the game, and Gruden kept his tradition of visiting with the crazies after a Raiders win. Jerry Mcdonald, The Mercury News, "Five keys for the Raiders against AFC West powerhouse Kansas City," 14 Sep. 2019 That’s the same thing that the Dayton, Ohio shooter did…You have fringe crazies on all sides. Bill Lambrecht, ExpressNews.com, "Castro says local donations have helped fund Trump’s anti-Latino ads," 7 Aug. 2019 Recent Examples on the Web: Adverb Then the internet started going crazy over whipping instant coffee and shortcut recipes. Katlyn Moncada, Better Homes & Gardens, "Use This Versatile 2-Ingredient Dough to Make Pizza, Donuts, and More," 19 May 2020 Of course, Amy's fans are going crazy over the engagement announcement. Kayla Keegan, Good Housekeeping, "'Little People, Big World' Fans Have Feelings About Amy Roloff and Chris Marek's Engagement," 20 Sep. 2019 The twitter world is going crazy over this epic pitch by Oliver Drake of the Tampa Bay Rays. Rhett Allain, WIRED, "Let's Break Down the Physics of a Wickedly Curving Baseball," 31 July 2019 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

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.

See More

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

Keep scrolling for more

Learn More about crazy

Time Traveler for crazy

Time Traveler

The first known use of crazy was in 1566

See more words from the same year

Statistics for crazy

Last Updated

8 Jul 2020

Cite this Entry

“Crazy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crazy. Accessed 13 Jul. 2020.

Keep scrolling for more

More Definitions for crazy

crazy

adjective
How to pronounce crazy (audio)

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

Keep scrolling for more

More from Merriam-Webster on crazy

Thesaurus: All synonyms and antonyms for crazy

Rhyming Dictionary: Words that rhyme with crazy

Spanish Central: Translation of crazy

Nglish: Translation of crazy for Spanish Speakers

Britannica English: Translation of crazy for Arabic Speakers

Comments on crazy

What made you want to look up crazy? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!