What does "light up" mean?

To become visibly happy or excited When someone's face shows sudden joy.

How do you use "light up" in a sentence?

Her face lit up when she saw him. His eyes lit up at the mention of food. She lights up whenever you walk in.

Phrasal Verb BritishAmericanAustralian ★★★★☆ Common Neutral

Significado: To become visibly happy or excited

容光焕发、眼睛发亮、神采飞扬

Iluminársele la cara a alguien

顔がパッと明るくなる、目を輝かせる

얼굴이 환하게 밝아지다, 눈이 반짝이다

When someone's face shows sudden joy.

某人的脸上突然显露出喜悦。

Cuando la cara de alguien muestra alegría repentina.

誰かの顔が突然喜びを見せること。

갑작스러운 기쁨이 얼굴에 드러나는 것.

Base verb: light

Particle: up

Separable: No — the verb and particle stay together

Her face lit up when she saw him.
看到他时她容光焕发
Se le iluminó la cara cuando lo vio
彼を見たとき彼女の顔がパッと明るくなった
그를 보자 그녀의 얼굴이 환하게 밝아졌다.
His eyes lit up at the mention of food.
一提到食物他的眼睛就发亮
Se le iluminaron los ojos al mencionar la comida
食べ物の話を聞いて彼の目が輝いた
음식 얘기가 나오자 그의 눈이 반짝였다.
She lights up whenever you walk in.
每次你走进来她都神采飞扬
Se le ilumina la cara cada vez que entras
あなたが入ってくるといつも彼女は顔を輝かせる
네가 들어오면 그녀는 항상 얼굴이 환해져.

Contexto: happiness, excitement

Tono: joyful

From illumination showing brightness.

Era: Modern

Generation: All ages

Social background: Universal