Longman Dictionary of Contemporary English homepage

trigger

2 verb
     
trigger2 also trigger off [transitive]
1 to make something happen very quickly, especially a series of events:
The assassination triggered off a wave of rioting.
Certain forms of mental illness can be triggered by food allergies.
trigger a memory (=make you suddenly remember something)
His action triggered a massive response from the government.
2 to make something such as a bomb or electrical system start to operate:
The burglars fled after triggering the alarm.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary