An opera in which arias and other sections are clearly separable.
（咏叹调和其他部分明显分开的）分曲歌剧
Example sentencesExamples
This sensation of fragmentation effectively places the work closer to number opera, rather than Wagnerian music-drama, even though there are no actual set pieces in the traditional sense.
Returning to the conventions of the number opera, as Krenek and Hindemith did, could not but produce music disquietingly at odds with its modern subject matter.
Perhaps one very specific innovation that can be attributed to the work as a whole is that it achieved, like Weill over 30 years previously, a modern re-interpretation of the 18th-century number opera.
Definition of number opera in US English:
number opera
noun
An opera in which arias and other sections are clearly separable.
（咏叹调和其他部分明显分开的）分曲歌剧
Example sentencesExamples
This sensation of fragmentation effectively places the work closer to number opera, rather than Wagnerian music-drama, even though there are no actual set pieces in the traditional sense.
Returning to the conventions of the number opera, as Krenek and Hindemith did, could not but produce music disquietingly at odds with its modern subject matter.
Perhaps one very specific innovation that can be attributed to the work as a whole is that it achieved, like Weill over 30 years previously, a modern re-interpretation of the 18th-century number opera.