¹stupid

adjective stu·pid \ˈstü-pəd, ˈstyü-\

: not intelligent : having or showing a lack of ability to learn and understand things

: not sensible or logical

: not able to think normally because you are drunk, tired, etc.

Full Definition of STUPID

a : slow of mind : obtuse

b : given to unintelligent decisions or acts : acting in an unintelligent or careless manner

c : lacking intelligence or reason : brutish

: dulled in feeling or sensation : torpid <still stupid from the sedative>

: marked by or resulting from unreasoned thinking or acting : senseless <a stupid decision>

a : lacking interest or point <a stupid event>

b : vexatious, exasperating <the stupid car won't start>

— stu·pid·ly adverb

— stu·pid·ness noun

See stupid defined for English-language learners

See stupid defined for kids

Origin of STUPID

Middle French stupide, from Latin stupidus, from stupēre to be numb, be astonished — more at type

First Known Use: 1541

Related to STUPID

Synonyms: airheaded, birdbrained, bonehead, boneheaded, brain-dead, brainless, bubbleheaded, chuckleheaded, dense, dim, dim-witted, doltish, dopey (also dopy), dorky [slang], dull, dumb, dunderheaded, empty-headed, fatuous, gormless [chiefly British], half-witted, knuckleheaded, lamebrain (or lamebrained), lunkheaded, mindless, oafish, obtuse, opaque, pinheaded, senseless, simple, slow, slow-witted, soft, softheaded, thick, thickheaded, thick-witted, unintelligent, unsmart, vacuous, weak-minded, witless

Antonyms: apt, brainy, bright, brilliant, clever, fast, hyperintelligent, intelligent, keen, nimble, quick, quick-witted, sharp, sharp-witted, smart, supersmart, ultrasmart

Synonym Discussion of STUPID

stupid, dull, dense, crass, dumb mean lacking in power to absorb ideas or impressions. stupid implies a slow-witted or dazed state of mind that may be either congenital or temporary <stupid students just keeping the seats warm> <stupid with drink>. dull suggests a slow or sluggish mind such as results from disease, depression, or shock <monotonous work that leaves the mind dull>. dense implies a thickheaded imperviousness to ideas <too dense to take a hint>. crass suggests a grossness of mind precluding discrimination or delicacy <a crass, materialistic people>. dumb applies to an exasperating obtuseness or lack of comprehension <too dumb to figure out what's going on>.