the part of the stage in a theatre that is in front of the curtain 台口（剧场舞台帷幕前的部分） a traditional theatre with a proscenium arch (= one that forms a frame for the stage where the curtain is opened) 舞台有拱形框架的传统剧场
Oxford Collocations DictionaryProscenium is used before these nouns:- arch
Word Originearly 17th cent.: via Latin from Greek proskēnion, from pro ‘before’ + skēnē ‘stage’.