Adjective stupid has 3 senses
  1. stupid - lacking or marked by lack of intellectual acuity
    smart, astute, sharp, shrewd, cagey, cagy, canny, clever, streetwise, street smart, with-it
  2. dazed, stunned, stupefied, stupid - in a state of mental numbness especially as resulting from shock; "he had a dazed expression on his face"; "lay semiconscious, stunned (or stupefied) by the blow"; "was stupid from fatigue"
    Antonyms: clearheaded, clear-thinking (indirect, via confused)
  3. unintelligent, stupid - without much intelligence; "a dull job with lazy and unintelligent co-workers"
,Noun stupid has 1 sense
  1. stupid, stupid person, dullard, dolt, pudding head, pudden-head, poor fish, pillock - a person who is not very bright; "The economy, stupid!"
    --1 is a kind of simpleton, simple
    --1 has particulars: berk; klutz