Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “silly”


adjective    /ˈsɪl·i/
showing a lack of thought or judgment; not serious and not showing much intelligence: a silly grin I watched another silly movie last night. silliness    /ˈsɪl·i·nəs/ noun [U] It’s time to stop the silliness and get serious.
(Definition of silly adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of silly

Definitions of “silly” in other dictionaries

Word of the Day


a person or group who receives money, advantages, etc. as a result of something else

Word of the Day


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