noun / verb
trigger
TRIG-er/ˈtrɪɡər/
A control whose activation sets a mechanism in motion.
The first domino acts as a trigger for the falling chain.
Etymology
Dutch trekker names the device and comes from a verb meaning “to pull.” The English verb extends the image of setting off a firearm to causing an event, reaction, or process to begin.
In context
scientists use vaccines to trigger the body's adaptive immune system, without exposing humans to the full strength disease
More examples
- Pull the spray bottle's trigger to release a fine mist.
- Keep your finger off the gun's trigger until you're ready to fire.
- Pressing this button triggers the camera's shutter.
Forms
trigger · triggers · triggered · triggering