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English definition of “stupidity”

stupidity

noun [U]     /stjuːˈpɪd.ɪ.ti/ US  /stuːˈpɪd.ə.t̬i/
C2 the state of being silly or unwise: a moment/act of stupidity Her stupidity is beyond belief sometimes. It was sheer stupidity to refuse at the price they were offering.Stupid and silly behaviour
(Definition of stupidity noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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