tip-off noun definition in Solving crime topic from the Oxford Advanced Learner's Dictionary

tip-off

 noun: Solving crime topic
secret information that somebody gives, for example to the police, to warn them about an illegal activity that is going to happen The man was arrested after an anonymous tip-off. Customs officers had received a tip-off about a shipment of cocaine. He was arrested after a tip-off to police.

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Crime and law