柯林斯詞典operetta /??p??r?t?/ (operettas) 1. N-VAR An operetta is a light-hearted opera which has some of the words spoken rather than sung. 輕歌劇 返回 operetta劍橋詞典a humorous theatre piece with singing and sometimes dancing , or works of this type 輕歌劇，小歌劇 返回 operetta