Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “stupid”

stupid

adjective  /ˈstu·pɪd/ us  
lacking thought or intelligence: I just made another stupid mistake. infml You might say something is stupid because it annoys you: Turn off that stupid program!
stupidity
noun [U]  /stuˈpɪd·ɪ·t̬i/ us  
Can you believe my stupidity? I locked my keys in the car!
(Definition of stupid from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of stupid?
Add Cambridge dictionaries to your browser to your website

Definitions of “stupid” in other dictionaries

Word of the Day

improvisation

a performance that an actor, musician, etc. has not practised or planned

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