light up
- (verb): To illuminate, to bring light to something, to brighten.
- (verb): To show an increase in activity or a brightening of mood.
- (verb): To light a cigarette, pipe etc.
- (verb): To make happy.
- (verb): To open fire on a target or group of targets.
- (verb): To shock (someone) with a stun gun.
- He saw Mary and his face lit up.
- Smoking in this building is not allowed, so I always step outside to light up.