Definition
- C2Verb + that
to confidentially alert someone about an upcoming event, enabling them to take measures or avert its occurrence
密报给（某人）；给予（某人）事先警告
She tipped him off that the police were coming to arrest him.
她密报他警察要来逮捕他。
He tipped off his friend to the impending danger to keep him safe.
他向朋友通报了即将到来的危险，以确保他的安全。
The source tipped the reporter off, preventing the scandal from escalating.
消息来源向记者通报，阻止了丑闻的升级。