Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “crazy”

crazy

noun [C usually pl]    /ˈkreɪ·zi/ infml
a person who acts in a strange or threatening way, esp. one who is mentally ill: Are we talking about a bunch of crazies or about a legitimate military force?
(Definition of crazy noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of crazy

Definitions of “crazy” in other dictionaries

Word of the Day

exercise

physical activity that you do to make your body strong and healthy

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