set something off

Từ điển Oxford Advanced Learner 8th

ˌset sthˈoff derived
1. to make a bomb, etc. explode
• A gang of boys were setting off fireworks in the street.
2. to make an alarm start ringing
• Opening this door will set off the alarm.
3. to start a process or series of events
• Panic on the stock market set off a wave of selling.
4. to make sth more noticeable or attractive by being placed near it
•That blouse sets off the blue of her eyes.
Main entry: ↑set_derived