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English definition of “brighten”

brighten

verb [I, T]
 
 
/ˈbraɪtən/ (also brighten up)
LIGHT to become lighter or more colourful, or to make something become lighter or more colourful: A picture or two would brighten up the room.Emitting and casting light
HAPPY to become happier, or to make someone become happier: She brightened up when she saw him.Feeling pleasure and happinessTaking pleasure in something
(Definition of brighten from the Cambridge Learners Dictionary © Cambridge University Press)
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