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English definition of “tamper with sth”

tamper with sth

verb uk phrasal verb with tamper   /ˈtæm.pər/ us    /-pɚ/
to touch or make changes to something that you should not, usually without enough knowledge of how it works or when you are trying to damage it: I could see at once that the lock had been tampered with.
(Definition of tamper with sth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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