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English definition of “foolish”

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foolish

adjective uk   /ˈfuː.lɪʃ/ us  
B2 unwise, stupid, or not showing good judgment: That was a rather foolish thing to do. She was afraid that she would look foolish if she refused. It was foolish of them to pay so much.
More examples
foolishly
adverb uk   /-li/ us  
B2 Foolishly, I didn't write the phone number down.
foolishness
noun [U] uk   /-nəs/ us  
Translations of “foolish”
in Korean 멍청한…
in Arabic أَحْمَق, سَخيف…
in Portuguese bobo, tolo, insensato…
in Catalan ximple, estúpid…
in Japanese 愚かな…
in Italian sciocco…
in Chinese (Traditional) 愚蠢的,傻的…
in Russian глупый…
in Turkish aptal, akılsız…
in Chinese (Simplified) 愚蠢的,傻的…
in Polish głupi…
(Definition of foolish from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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