crazy

[krey-zee]

adjective

crazier, craziest 

1. mentally deranged; demented; insane.

   Synonyms: lunatic, crazed
   Antonyms: sane

2. Informal.,  unpredictable, nonconforming, or odd.

   All I can say is she's the craziest person I know.

3. Informal.,  unusual; bizarre; singular.

   She always wears a crazy hat.

4. Informal.,  senseless; nonsensical; totally unsound.

   Surely you don’t plan to invest money in that crazy scheme!

   Synonyms: foolhardy, imprudent, foolish

5. Informal.,  extremely busy, hectic, chaotic, etc..

   Yesterday was such a crazy day I hardly had time to eat.

6. 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

7. Informal.,  very enamored or infatuated (usually followed by about orfor ).

   It's obvious he's just crazy about her.

8. Informal.,  intensely anxious or eager; impatient.

   I'm crazy to try those new skis.

9. Informal.,  very annoyed, frustrated, or bothered.

   It makes me crazy that some kids don't get a fair chance in life.

10. 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.

11. Slang.,  wonderful; excellent; perfect.

    That's crazy, man, crazy.

12. Archaic.,  likely to break or fall to pieces.

    Synonyms: passionate, impassioned, ardent
    Antonyms: stable

13. Archaic.,  weak, infirm, or sickly.

    Antonyms: healthy, strong

adverb

1. Informal.,  extremely; madly.

   December is a crazy busy month for us.

   That new clothing store is crazy popular with teenage girls.

noun

plural

crazies 

1. a person who is mentally deranged or insane.

2. Informal.,  an unpredictable, nonconforming person; oddball.

   Next door is a house full of crazies who wear weird clothes and come in at all hours.

3. 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.

crazy

/ ˈkreɪzɪ /

adjective

1. informal,  insane

2. fantastic; strange; ridiculous

   a crazy dream

3. informal,  (postpositive; foll by about or over) extremely fond (of)

4. slang,  very good or excellent

noun

1. informal,  a crazy person

Other Word Forms

• crazily adverb
• craziness noun
• half-crazy adjective

Word History and Origins

Origin of crazy¹

First recorded in 1570–80; craz(e) + -y ¹

Idioms and Phrases

Idioms

1. like crazy,

   1. with great enthusiasm or energy; to an extreme.

      We shopped like crazy and bought all our Christmas gifts in one afternoon.

   2. with great speed or recklessness.

      He drives like crazy once he's out on the highway.

More idioms and phrases containing crazy

• drive someone crazy
• like crazy

Synonym Study

See mad.

Example Sentences

“I remember staring out the window, and I’m like, ‘Oh, my God,’ it’s like this crazy, full-circle moment,” she said.

From Los Angeles Times

“It’s so crazy to have that experience where I’m now that person and there might be a kid somewhere who’s like ‘Oh, my God, I see myself you.’

From Los Angeles Times

It is nice to share it with people because other people go through that and the response was crazy.

From BBC

"Preparation for this was crazy. I'm not going tell you before it," he said with a knowing grin.

From BBC

It’s very crazy because “Loco” was an experiment.

From Los Angeles Times

Related Words

• absurd 
• bizarre 
• foolish 
• goofy 
• insane 
• irresponsible 
• ludicrous 
• odd 
• outrageous 
• preposterous 
• ridiculous 
• silly 
• strange 
• weird