to light up
Pronunciation
/lˈaɪt ˈʌp/
British pronunciation
/lˈaɪt ˈʌp/

Definition & Meaning of "light up"in English

to light up
[phrase form: light]
01

to make something bright by means of color or light

Transitive: to light up sth
to light up definition and meaning
example
Examples
The Christmas tree lights twinkled brightly, lighting up the living room with a warm, festive glow.
The fireworks exploded high in the sky, lighting the night up with bursts of colorful brilliance.
1.1

to become bright by means of color or light

Intransitive
example
Examples
The stage lit up as the spotlight shone on the lead actor, ready for her big entrance.
The night sky lit up with a dazzling display of stars and the ethereal glow of the moon.
02

to begin burning, producing visible flames and releasing heat

Intransitive
example
Examples
The candle wick lights up as the flame touches it.
The dry leaves lit up quickly in the bonfire.
2.1

to cause something to start burning brightly

Transitive: to light up sth
example
Examples
She lit the candles up with a lighter.
The match lights up the paper quickly.
03

to start smoking a cigarette

Transitive: to light up a cigarette
example
Examples
The social smoker lit up a cigarette after dinner, joining in the conversation with friends.
The exhausted parent lit a cigarette up after a long day, seeking a moment of relaxation amidst the chaos.
04

to show happiness or excitement through a noticeable change in one's facial expression or demeanor

Intransitive
example
Examples
I ca n't wait to see her face light up when she receives the news.
His face lit up when he saw his favorite food on the table.
4.1

to bring liveliness, joy, or happiness to someone's expression

Transitive: to light up someone's expression
example
Examples
The surprise announcement of a promotion lit up his face with pure joy.
As the children entered the room, the sight of the beautifully decorated Christmas tree lit up their faces.
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