Definition
- C2Verb + that
to confidentially alert someone about an upcoming event, enabling them to take measures or avert its occurrence
密報給（某人）；給予（某人）事先警告
She tipped him off that the police were coming to arrest him.
她密報他警察要來逮捕他。
He tipped off his friend to the impending danger to keep him safe.
他向朋友通報了即將到來的危險，以確保他的安全。
The source tipped the reporter off, preventing the scandal from escalating.
消息來源向記者通報，阻止了醜聞的升級。