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English definition of “smart alec”

smart alec

noun [C] uk (also smart aleck)   /ˌsmɑːtˈæl.ɪk/ us    /ˌsmɑːrt-/ informal
someone who tries to appear clever or who answers questions in a clever way that annoys other peopleShowing arrogance and conceitConfidence and self-assuranceBoasting
(Definition of smart alec from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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