crazy
Americanadjective
-
crazier,
comparative
-
craziest
superlative
-
mentally deranged; demented; insane.
- Antonyms:
- sane
-
Informal. unpredictable, nonconforming, or odd.
All I can say is she's the craziest person I know.
-
Informal. unusual; bizarre; singular.
She always wears a crazy hat.
-
Informal. senseless; nonsensical; totally unsound.
Surely you don’t plan to invest money in that crazy scheme!
-
Informal. extremely busy, hectic, chaotic, etc..
Yesterday was such a crazy day I hardly had time to eat.
-
Informal. intensely enthusiastic; passionately excited (usually followed by about orfor ).
Like many kids, he was crazy for baseball and yearned to be a professional ballplayer.
- Antonyms:
- dispassionate, cool
-
Informal. very enamored or infatuated (usually followed by about orfor ).
It's obvious he's just crazy about her.
-
Informal. intensely anxious or eager; impatient.
I'm crazy to try those new skis.
-
Informal. very annoyed, frustrated, or bothered.
It makes me crazy that some kids don't get a fair chance in life.
-
Informal. having an unusual, unexpected, or random quality, behavior, result, pattern, etc..
I'm back in Connecticut in a crazy twist of events, living in the same town where I grew up.
-
Slang. wonderful; excellent; perfect.
That's crazy, man, crazy.
-
Archaic. likely to break or fall to pieces.
- Synonyms:
- passionate, impassioned, ardent
- Antonyms:
- stable
-
Archaic. weak, infirm, or sickly.
adverb
noun
-
crazies
plural
-
a person who is mentally deranged or insane.
-
Informal. an unpredictable, nonconforming person; oddball.
Next door is a house full of crazies who wear weird clothes and come in at all hours.
-
Informal. the crazies, a sense of extreme unease, nervousness, or panic; extreme jitters.
The crew was starting to get the crazies from being cooped up belowdecks for so long.
idioms
adjective
-
informal insane
-
fantastic; strange; ridiculous
a crazy dream
-
informal (postpositive; foll by about or over) extremely fond (of)
-
slang very good or excellent
noun
Synonym Usage
See mad.
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Adjectives
Etymology
Origin of crazy
Explanation
Use the adjective crazy to describe actions that aren't sensible, like the crazy way your brothers run around the house when their favorite team wins a game. Crazy can also mean "insane," though in today's world, it is offensive to apply it to those who struggle with mental illness. Instead, stick with using crazy to describe temporary and more light-hearted situations like being crazy about a new boyfriend or girlfriend or going "football crazy" during the Super Bowl.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Backshall recalled it as a "crazy version" of the TV sitcom The Good Life.
From BBC ● Oct. 2, 2026
“Wasn’t that crazy they were playing that song?”
From Los Angeles Times ● Oct. 2, 2026
“It started dropping as if there was turbulence, but crazy. Twenty, 30 seconds of a crazy freefall. It then stabilized and then again started falling,” said Italie, an Israeli ecommerce worker.
From The Wall Street Journal ● Sep. 30, 2026
It’s crazy, crazy to have kids lock up their phones and then walk into classrooms where there’s a chatbot that’s going to give them their lesson.
From Slate ● Sep. 29, 2026
I know how it’ll sound if I try: I’ll look like a crazy teenager while he looks the picture of a concerned father, the victim of his unruly teenage daughter.
From "Red Flags and Butterflies" by Sheryl Azzam
“We leave you alone and you should leave us alone. I mean, primarily those crazies in the West who are already making preparations.”
From Washington Times ● Aug. 18, 2023
It's clear as day who is normal and who the crazies are.
From Salon ● Feb. 8, 2023
I am the only one restraining these crazies.
From Seattle Times ● Jan. 20, 2023
If they do, almost everyone worthwhile will flee quickly, leaving the platform to the worst crazies and abusers.
From Washington Post ● May 1, 2022
“So you think after all that, Lana would leave us to die at the hands of some crazies and run for her life?”
From "The Kill Order (Maze Runner, Book Four; Origin)" by James Dashner
Here’s the crazier part: Sullivan, who made his MLS debut when he was just 14, is 16.
From The Wall Street Journal ● Sep. 24, 2026
I feel like things are getting crazier and better at the same time simultaneously at an accelerating pace.
From Los Angeles Times ● Jun. 11, 2026
Well, crazier things have happened than Megyn Kelly switching sides.
From Slate ● May 6, 2026
Driven by Watt's marketing genius, the fledgling company pulled stunt after attention-seeking stunt, each crazier than the last, and they were rarely out of the news.
From BBC ● Mar. 6, 2026
‘You’re crazier than any father of yours could ever be.’
From "The Heart is a Lonely Hunter" by Carson McCullers
“The ending was the craziest I’ve ever had,” Dorsey Hall of Fame coach Paul Knox said.
From Los Angeles Times ● Aug. 23, 2026
"And this is the lowest, the craziest level it's ever reached."
From Barron's ● Aug. 15, 2026
That’s not even the craziest thing that happened in cycling’s indelible three-week race.
From The Wall Street Journal ● Jul. 10, 2026
I’m not going to pretend I didn’t do the craziest thing that humans do.
From Salon ● Jun. 27, 2026
“That’s the craziest thing I’ve ever seen,” James said, flipping through the pages of The Gold-Bug.
From "Book Scavenger" by Jennifer Chambliss Bertman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
