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English definition of “tip-off”

tip-off

noun [C usually singular] uk   /ˈtɪp.ɒf/ us    /-ɑːf/ informal
a secret warning or piece of secret information: Acting on a tip-off, the police arrested the drug dealers. Following a tip-off from a friend, we sold all our shares in the company.Information and messagesThreats and warnings
(Definition of tip-off from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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