crazy
[adjective]
Synonyms:
- ridiculous, absurd, foolish, idiotic, ill-conceived, ludicrous, nonsensical, preposterous, senseless
- fanatical, devoted, enthusiastic, infatuated, mad, passionate, wild (informal)
- insane, crazed, demented, deranged, mad, nuts (slang), out of one's mind, unbalanced

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Antonyms: sane
Contrasted words: practical, reasonable, reasoned, sensible
Related Idioms: as crazy as a loon, having a screw loose, having bats in one's belfry, not having all one's marbles (or buttons), beyond the realm of reason, out of all reason
Related Words: doting, gaga, moonstruck, beeheaded, silly, erratic, possessed, goofy, senseless

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English Thesaurus: crazy, mad, nuts, loony, insane, ...

[TahlilGaran] English Synonym Dictionary ▲

I. cra‧zy¹ S2 /ˈkreɪzi/ adjective (comparative crazier, superlative craziest)

1. STRANGE very strange or not sensible Synonym : mad:
The neighbours must think we’re crazy.
It’s an absolutely crazy idea.
I know this idea sounds crazy, but it may be worth a try.
crazy to do something
It’d be crazy to go out in this rain.
I must have been crazy to agree to this.
He often works 12 hours a day – it’s crazy.

2. crazy about somebody/something liking someone very much, or very interested in something:
He’s crazy about her.
Dan’s crazy about football.

3. ANGRY angry or annoyed:
Turn that music down. It’s driving me crazy (=really annoying me)!
Dad will go crazy when he hears about this.

4. like crazy very much or very quickly:
We’re going to have to work like crazy to get this finished on time.

5. go crazy to do something too much, in a way that is not usual or sensible, especially because you are excited:
Don’t go crazy and spend it all at once.

6. MENTALLY ILL mentally ill Synonym : mad:
I feel so alone, sometimes I wonder if I’m going crazy.
—crazily adverb
—craziness noun [uncountable]

[TahlilGaran] Dictionary of Contemporary English ▲

II. crazy² noun (plural crazies) [countable] especially American English informal
someone who is crazy

[TahlilGaran] Dictionary of Contemporary English ▲

crazy
adj.
I. mad/wild
VERBS be, seem, sound | go I'd go crazy if I lived here.
drive sb The group's performance always drives the audience crazy.
ADV. really | absolutely, completely, totally | a bit, half, a little, pretty, quite, slightly
PREP. with We were crazy with excitement.

[TahlilGaran] Collocations Dictionary ▲

crazy
II. very angry
VERBS be | go | drive sb The kids would answer back, and that drove her crazy.
ADV. absolutely, completely
PREP. at He was crazy at me for letting the goal in.

[TahlilGaran] Collocations Dictionary ▲

crazy
adjective
See note at MAD 2 (mad)

[TahlilGaran] Dictionary of Common Errors ▲

crazy very strange or not sensible – used about people, ideas, and behaviour:
People think I’m crazy when I start talking about ghosts.
It was a crazy thing to do.
mad British English crazy:
Are you mad?
Whose mad idea was that?
At first, everyone thought he was completely mad.
nuts informal (also bonkers British English) [not before noun] crazy:
The whole thing sounds completely nuts.
Have you gone bonkers?
loony informal crazy:
another loony suggestion
The man is totally loony.
insane completely crazy:
I know it sounds insane, but it’s true.

[TahlilGaran] English Thesaurus ▲

mentally ill having an illness that affects your mind and your behaviour:
Many mentally ill people are treated in the community.
He was declared mentally ill and unfit to stand trial.
crazy informal mentally ill:
I couldn’t think straight. I felt like I was going crazy (=becoming crazy).
mad old-fashioned mentally ill. This word is now usually considered offensive, and is usually used in a different meaning, when you think that someone's ideas are not sensible:
Swift himself went mad (=became mad) later in life.
a mad old woman
insane [not before noun] old-fashioned having a serious and permanent mental illness:
She went insane after her two young sons were murdered.
a hospital for the criminally insane
disturbed not behaving in a normal way because of mental or emotional problems, especially problems that are caused by bad experiences:
She teaches emotionally disturbed children.
Her experiences left her deeply disturbed.
unstable having an emotional state that often changes very suddenly:
Her mother was mentally unstable.
He lived in a small Putney flat with his ageing Aunt Bunny, and his emotionally unstable sister, Nancy.
He was too unstable to be a leader.
deranged behaving in a crazy or dangerous way, usually because of being mentally ill:
A deranged young woman entered the school and took the life of one young boy.
psychopathic having a serious and permanent mental illness that causes violent or criminal behaviour:
The film is about a psychopathic killer.
psychotic suffering from or caused by a serious mental illness that changes your character and makes you unable to behave in a normal way:
psychiatric services for chronic psychotic patients.
There is a tendency for psychotic illnesses to be inherited.
neurotic relating to or suffering from a mental illness that makes you unreasonably worried of frightened:
His mother was neurotic and insecure.
She's neurotic about her weight.
A bored or lonely horse may become so neurotic that it chases itself around in circles.

[TahlilGaran] English Thesaurus ▲

stupid showing a total lack of good sense or good judgment. Stupid sounds very strong and is often used when you are annoyed or strongly criticizing someone’s behaviour:
I wish you’d stop asking stupid questions.
It was stupid of me to leave the door unlocked.
Well, if you’re stupid enough to skate on the lake, you deserve to fall in.
silly doing or saying things that are not sensible or serious, and that may make you feel embarrassed later. Silly sounds much gentler than stupid:
a silly mistake
Don’t be so silly! There’s nothing wrong with you.
I think you’re silly to worry so much about your hair.
daft informal not sensible, often in a way that is also amusing:
Is this another of your daft ideas?
Don’t be daft! Of course you’re not too old to go clubbing.
dumb informal especially American English stupid:
a dumb question
He was dumb enough to believe her.
Oh, I just did the dumbest thing back there, I forgot my purse.
foolish stupid. Foolish sounds rather formal and is used mainly in written English. The usual words to use in everyday English are silly or stupid:
It was a foolish thing to say.
They did not want to look foolish.
It was all a foolish dream.
I think the board of directors made a foolish choice that it will later regret.
unwise formal done without thinking carefully enough about the possible disadvantages that may result:
She knew the marriage was unwise.
an unwise choice of words
It would be very unwise to speculate.
brave British English often humorous used when you think that what someone is planning or suggesting is certain to fail, but you do not want to say directly that they are behaving in a stupid way:
The leader of the opposition described it as ‘a brave decision.’
I think he’s being very brave.
crazy not at all sensible or reasonable – used when you are very surprised by someone’s behaviour or what they have said:
Ian’s got some crazy plan to drive across Africa.
She looked at me as if I was crazy!
You’re crazy to think of hitch-hiking on your own.
ridiculous extremely stupid:
You look ridiculous in that hat.
Some people spend a ridiculous amount of money on cars.
It’s absolutely ridiculous to suggest that he would do something like that.
absurd/ludicrous extremely stupid – used especially when an idea or situation seems strange or illogical:
How can a return ticket cost less than a single? It’s totally absurd!
It was a ludicrous idea.
Some of the objections to the theory are simply absurd.
laughable so stupid that you cannot believe someone is telling the truth or being serious:
The accusations were almost laughable.
a laughable suggestion
It would be laughable if it wasn’t so serious.

[TahlilGaran] English Thesaurus ▲