Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: French
Origin: stupide, from Latin stupidus, from stupere 'to surprise extremely, stun'

stupid

1 adjective
     
stu‧pid1 S1 W3
1 showing a lack of good sense or good judgment [= silly]:
stupid mistakes
That was a stupid thing to say.
I can't believe Kate was stupid enough to get involved in this.
stupid idea/question
Whose stupid idea was this?
It was stupid of me to lose my temper.
2 having a low level of intelligence, so that you have difficulty learning or understanding things:
He understands - he's not stupid.
I couldn't do it, and it made me feel stupid.
3 spoken used when you are talking about something or someone that makes you annoyed or impatient:
I can't get this stupid radio to work.
What is that stupid idiot doing?
4

stupid with cold/sleep/shock etc

unable to think clearly because you are extremely tired, cold etc
—stupidly adverb:
I stupidly agreed to organize the party.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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