lacking ordinary quickness and keenness of mind; slow-witted.
annoying or irritating; troublesome: Turn off that stupid radio.
in a state of stupor; stupefied: After a twelve-hour work day, she was stupid from fatigue.
Informal. a stupid person.
- stu·pid·ly, adverb
- stu·pid·ness, noun
- un·stu·pid, adjective
- un·stu·pid·ly, adverb
- un·stu·pid·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for stupid
lacking in common sense, perception, or normal intelligence
(usually postpositive) stunned, dazed, or stupefied: stupid from lack of sleep
having dull mental responses; slow-witted
trivial, silly, or frivolous
informal a stupid person
- stupidly, adverb
- stupidness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012