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English definition of “light (sth) up”

light (sth) up

(EXPRESSION) phrasal verb with light     /laɪt/ verb (lit or lighted, lit or lighted)
If your face or eyes light up, or if a smile lights up your face , you suddenly look happy : Rosie's whole face lit up with excitement when she saw the presents .Causing pleasure
(Definition of light (sth) up (EXPRESSION) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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