student asking question

What does "One's face lights up" mean?

teacher

Native speaker’s answer

Rebecca

When one's "face lights up," it means that they are showing an extremely happy expression, a radiant, beaming smile. This is what the speaker is referring to in the video, that they had extremely happy expressions on their faces. Ex: The child saw Santa and her face lit up. Ex: His face lit up when he saw the surprise.

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