light up

Short definition from Wiktionary

Verb

1. 1
   To illuminate, to bring light to something, to brighten.
2. 2
   To start to emit light; to become activated as a light source.
3. 3
   To show an increase in activity or a brightening of mood.
4. 4
   To ignite.
5. 5
   To light a cigarette, pipe, etc.
6. 6
   To light a cigarette, pipe, etc. for (someone).
7. 7
   To make happy.
8. 8
   To introduce (someone to something), to make someone aware of or interested in something; turn on.
9. 9
   To open fire on a target or group of targets, especially with rockets, a flamethrower, etc.
10. 10
    To shock (someone) with a stun gun.
11. 11
    To activate the emergency sirens on a police vehicle in order to pull someone over.
12. 12
    To loosen, slacken, or ease off.

Adjective

1. 1
   That lights up