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English definition of “catch sb out”

catch sb out

(SHOW WRONG) informal phrasal verb with catch     /kætʃ/ verb (caught, caught)
to show that someone is doing wrong: I suspected he wasn't telling me the truth, and one day I caught him out when I found some letters he'd written.Proving and disproving
(Definition of catch sb out (SHOW WRONG) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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