Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “fatuous”


adjective     /ˈfæt.ju.əs/ formal
stupid, not correct, or not carefully thought about: a fatuous ideaStupid and sillyOf unsound mind fatuously     /-li/ adverb fatuousness     /-nəs/ noun [U]
(Definition of fatuous adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of fatuous

Definitions of “fatuous” in other dictionaries

Word of the Day


a journey on a large ship for pleasure, during which you visit several places

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