light up

[phrasal verb]

a of a light : to become lit : to begin shining（灯）开始发光

— often used figuratively常用作比喻

His eyes/face lit up [=he looked very happy and pleased] when she walked in the room.她走进房间时，他两眼一亮/面露喜色。

b informal, of a telephone : to show a light indicating that someone is calling（电话）亮灯

When the DJ announced a contest, the phones lit up. [=the lights on the phones lit up because many people were calling]电台节目主持人宣布比赛开始后，电话就都亮灯了。

light (something) up or light up (something) : to provide light for (something) : to fill (something) with light照亮

— often used figuratively常用作比喻

A smile lights up her whole face. [=a smile makes her whole face look happy and radiant]微笑使她神采奕奕。
Her smile lights up the room. [=she has an extremely bright and attractive smile]她的微笑照亮了房间。

informal : to light a cigarette点烟

⇒ Main Entry: ³ light

phrasal verb

of a light : to become lit : to begin shining

All of the lights on the display suddenly lit up.

—often used figuratively to express interest or pleasure

His eyes/face lit up when she walked in the room.

informal, of a telephone : to show a light indicating that someone is calling

When the DJ announced a contest, the phones lit up.

informal : to light a cigarette

I can't wait to light up after work.