brighten/ˋbraItṇ; ˈbraItn/also 又作 brighten upv 1 [I,T] to become brighter or more pleasant, or to make something brighter or more pleasant(使)更明亮﹔(使)更宜人: The weather should brighten up in the afternoon. 下午天气应该会转晴。She bought flowers to brighten the room. 她买了花让房间亮丽起来。2 [I,T] to become happier, or to make someone happier(使)高兴起来: She brightened up when she saw us coming. 她看到我们来了﹐就高兴起来。