light up🔊

To illuminate, to bring light to something, to brighten. +

To start to emit light; to become activated as a light source. +

(figuratively) To show an increase in activity or a brightening of mood.

To ignite. +

To light a cigarette, pipe{{,}} etc. +

To make happy. +

To introduce (someone to something), to make someone aware of or interested in something; turn on.

(slang) To open fire on a target or group of targets, especially with rockets, a flamethrower{{,}} etc.

(slang) To shock (someone) with a stun gun. +

(slang) To activate the emergency sirens on a police vehicle in order to pull someone over.

(nautical) To loosen, slacken{{,}} or ease off.