o·pus
noun/ˈəʊpəs/
/ˈəʊpəs/
(plural opera
[usually singular]/ˈɒpərə/
/ˈɑːpərə/
)- (abbreviation op.)a piece of music written by a famous composer and usually followed by a number that shows when it was written
（按作曲家的创作时间排列的）编号乐曲 - Beethoven’s Opus 18
贝多芬第十八号作品
- Beethoven’s Opus 18
- (formal) an important piece of literature, etc., especially one that is on a large scale
主要（文学等）作品；（尤指）大作，巨著
Word Originearly 18th cent.: from Latin, literally ‘work’.