noun · A flat surface, often made of fabric, used for the projection of films or images.

电影幕上出现了精彩的画面。

measure word · A major division of a play, opera, or other theatrical performance.

这部话剧一共分为三幕，讲述了一个动人的故事。

noun, measure word · A large piece of hanging cloth used to partition a space, especially the stage in a theater.

演出结束后，舞台的大幕缓缓地落了下来。