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English definition of “light up something”

light up something

(MAKE BRIGHT) phrasal verb with light    /lɑɪt/ verb (past tense and past participle lit  /lɪt/ or lighted)
to make something bright or shiny : When I’d say there was a letter for him you could see his eyes light up.
(Definition of light up something (MAKE BRIGHT) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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