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English definition of “run-in”

run-in

noun [C]     /ˈrʌn.ɪn/ informal
If you have a run-in with someone, you have a serious argument with them or you get into trouble with them: I had a run-in with the boss/the law/the police yesterday.Arguments and disagreements
(Definition of run-in noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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