light up

US /laɪt ʌp/
UK /laɪt ʌp/
"light up" picture
1.

to illuminate or make something brighter

:
•
The Christmas tree began to light up as soon as it was plugged in.
•
The city skyline began to light up as dusk fell.
:
illuminatebrightenglowshineradiate
2.

to make someone's face or eyes show pleasure or excitement

:
•
Her face lit up when she saw the surprise gift.
•
His eyes lit up with excitement at the news.
:
brightengleamsparklebeamradiate
3.

to start smoking a cigarette, cigar, or pipe

:
•
He decided to light up a cigarette after dinner.
•
Please don't light up in here; it's a non-smoking area.
:
ignitesparkkindlesmoke
:
lightlightinglightnessin the light oftraffic lighttraffic lightslight bulb