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:
People sometimes tell me about reading Salon avidly in their youth, how it felt like connecting to something exhilarating and cool and a bit crazy in the strange new expanses of the internet.
From Slate ● Nov. 6, 2026
I know it’s a crazy high price and will be the most expensive item I’ve ever bought outside of my house.
From MarketWatch ● Nov. 5, 2026
In fact, it took a whole host of crazy things, which may actually have started several minutes before their first goal hit the net.
From The Wall Street Journal ● Nov. 4, 2026
Hartland, from Machen, Caerphilly county, said his latest release, Wild Bull, was rooted in "being a bit crazy" and the challenges of growing up in the south Wales valleys.
From BBC ● Nov. 1, 2026
He’s not crazy about my staying after school; luckily, I convince him that I am, once again, fine.
From "Split the Sky" by Marie Arnold
It features “the freaks, crazies and weirdos” you can find there when the weather’s nice.
From Los Angeles Times ● Apr. 16, 2023
“The crazies started coming out of the woodwork,” Epps testified to the congressional panel.
From Washington Times ● Mar. 23, 2023
I am the only one restraining these crazies.
From Seattle Times ● Jan. 20, 2023
“Note: I was able to keep the crazies off the stage,” she texted at 2:40 p.m.
From Washington Post ● Feb. 26, 2022
“Let’s just get on board before some of them crazies catch up to us.”
From "The Kill Order (Maze Runner, Book Four; Origin)" by James Dashner
The daily schedule is crazier than the color-coded calendar of a working mom.
From The Wall Street Journal ● Nov. 4, 2026
Well, crazier things have happened than Megyn Kelly switching sides.
From Slate ● May 6, 2026
“It’s crazier around August, September, is when we’ll probably reach our peak production” of up to 72,000 mosquitoes a week, he said.
From Los Angeles Times ● Mar. 22, 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
The crazier the rumors got, the more they worried Groves and Oppenheimer.
From "Bomb" by Steve Sheinkin
“I was like, ‘What are the world’s craziest residential pools?’ and when I searched online, this came up,” he explained.
From MarketWatch ● Nov. 2, 2026
Babydoll singer Jamie Miller on 'the craziest journey'
From BBC ● Oct. 16, 2026
"And this is the lowest, the craziest level it's ever reached."
From Barron's ● Aug. 15, 2026
“The craziest thing is that I don’t think I ate a vegetable the entire time, which is why the transformation was so shocking,” Renne said.
From The Wall Street Journal ● Aug. 8, 2026
This was the craziest thing I’d ever heard.
From "The Best School Year Ever" by Barbara Robinson
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
