Definition of 'crazy'

COBUILD frequency band

crazy

(kreɪzi

)

Word forms: comparative crazier, superlative craziest, plural crazies

1. adjective

If you describe someone or something as crazy, you think they are very foolish or strange.

[informal, disapproval]

People thought they were all crazy to try to make money from manufacturing.

crazily adverb

The teenagers shook their long, black hair and gesticulated crazily.

2. adjective

Someone who is crazy is insane.

[informal]

If I sat home and worried about all this stuff, I'd go crazy.

3. adjective [v-link ADJ about n]

If you are crazy about something, you are very enthusiastic about it. If you are not crazy about something, you do not like it.

[informal]

He's still crazy about both his work and his hobbies.

4. adjective [v-link ADJ about n]

If you are crazy about someone, you are deeply in love with them.

[informal]

We're crazy about each other.

More Synonyms of crazy

American English pronunciation

It seems that your browser is blocking this video content.

To access it, add this site to the exceptions or modify your security settings, then refresh this page.

British English pronunciation

It seems that your browser is blocking this video content.

To access it, add this site to the exceptions or modify your security settings, then refresh this page.

crazy in American English

(ˈkreɪzi )

adjectiveWord forms: ˈcrazier or ˈcraziest

having flaws or cracks

shaky or rickety; unsound

unsound of mind; mentally unbalanced or deranged; psychopathic; insane

of or for an insane person

temporarily unbalanced, as with great excitement or rage

4. Informal

foolish, wild, fantastic, etc.; not sensible

a crazy idea

5. Informal

very enthusiastic or eager

crazy about the movies

interjection US

6. Slang

used to express approval, pleasure, wonder, etc.: now rare

nounWord forms: plural ˈcrazies US

7. Slang

an eccentric or mentally unbalanced person

Idioms:

like crazy

Derived forms

crazily (ˈcrazily)

adverb

craziness (ˈcraziness)

noun

Word origin

< craze

COBUILD frequency band

crazy in American English

(ˈkreizi) (adjective -zier, -ziest, noun plural -zies)

adjective

senseless; impractical; totally unsound

a crazy scheme

2. informal, offensive

having a severe mental illness

3. informal

intensely enthusiastic; passionately excited

crazy about baseball

4. informal (usually fol. by about)

very enamored or infatuated

He was crazy about her

5. informal

intensely anxious or eager; impatient

I'm crazy to try those new skis

6. informal

unusual; bizarre; singular

She always wears a crazy hat

7. slang

wonderful; excellent; perfect

That's crazy, man, crazy

likely to break or fall to pieces

weak, infirm, or sickly

10.

having an unusual, unexpected, or random quality, behavior, result, pattern, etc

a crazy reel that spins in either direction

11. See like crazy

noun

12. slang

an unpredictable, nonconforming person; oddball

a house full of crazies who wear weird clothes and come in at all hours

13. See the crazies

SYNONYMS 1. crazed, lunatic. See mad. 2. foolish, imprudent, foolhardy. 8. rickety, shaky, tottering.ANTONYMS 1. sane. 3. calm, dispassionate. 8. stable. 9. strong; healthy.

Derived forms

crazily

adverb

craziness

noun

Word origin

[1570–80; craze + -y1]

COBUILD frequency band

crazy in British English

(ˈkreɪzɪ

)

adjectiveWord forms: -zier, -ziest informal

foolish or irrational

don't do anything crazy

wildly excited; out of control

the fans went crazy

fantastic; strange; ridiculous

a crazy dream

outrageous; excessive

at a crazy speed

5. (postpositive; foll by about or over) informal

extremely fond (of)

6. offensive

having a mental illness, esp one causing aberrant behaviour

nounWord forms: plural crazies slang

7. derogatory

a person considered as having extreme or irrational views

8. offensive

a person with a mental illness, esp one causing aberrant behaviour

▶ USAGE Using an informal word to refer to mental illness, or people who have mental health problems, can be considered highly insensitive and should be avoided

Derived forms

crazily (ˈcrazily)

adverb

craziness (ˈcraziness)

noun

Examples of 'crazy' in a sentence
crazy

These examples have been automatically selected and may contain sensitive content that does not reflect the opinions or policies of Collins, or its parent company HarperCollins.

We welcome feedback: report an example sentence to the Collins team. Read more…

Talk of a crisis is crazy.But not the crazy amounts you see at the port.He only said those crazy things during the campaign to get elected.The price of land for new farmers is crazy.Being ninth is pretty cool and pretty crazy.It was so crazy it might just work!We lost six members of staff and to replace that with one seems a bit crazy.So why does she say crazy things?Or go crazy and use it in the shower as an indulgent washing gel.That would send me a little bit crazy.