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English definition of “light (sth) up”

light (sth) up

verb uk phrasal verb with light   /laɪt/ (lit or lighted, lit or lighted) us  

(EXPRESSION)

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

(CIGARETTE)

to light a cigarette: I was lighting up when I noticed a 'no smoking' sign.Tobacco and smoking
(Definition of light (sth) up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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