Definition (cause)
- C2
to trigger an activity or event, often initiating a sequence of occurrences.
The report set off a wave of concern in society regarding environmental issues.
Her speech set off an interest in science among the students.
The accident set off a series of safety inspections.
- C2
to initiate a loud noise or cause an explosion, such as that produced by a bomb or an alarm, to occur.
When the alarm went off, the entire building fell into chaos, truly setting off a panic.
The experiment successfully set off a small explosive device.
The fireworks display at the party set off loud applause, making the crowd deafening.