Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “crazy”

crazy

adjective     /ˈkreɪzi/
STUPID A2 stupid or strange: a crazy idea I was crazy not to take that job.Stupid and sillyOf unsound mindStrange, suspicious and unnatural
ANGRY B2 annoyed or angry: The children are driving me crazy (= making me annoyed). Dad went crazy when I told him what had happened.Angry and displeasedBad-tempered
be crazy about sb/sth A2 to love someone very much, or to be very interested in something: Mia's crazy about baseball.Loving and in loveExcited, interested and enthusiastic
go crazy to become very excited about something: When he came on stage the audience went crazy.Excited, interested and enthusiastic
like crazy informal If you do something like crazy, you do a lot of it, or do it very quickly: We worked like crazy to get everything finished.Work, working and the workplaceWorking hours and periods of workIntensifying expressions
crazily adverb craziness noun [U]
(Definition of crazy adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

More Learner's Dictionary definitions for “crazy”

Definitions of “crazy” in other dictionaries

Word of the Day

closeness

the quality of knowing someone very well, liking them a lot, and wanting to spend a lot of time together

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More