All 14 Uses of

opera
in
The Picture of Dorian Gray - 13 chapter version

They ... used to be always seen together at the Opera, and wherever good music was going on.
Chpt 12 *

opera = performances of classical music plays in which most of the dialogue is sung

My dear Harry, we either lunch or sup together every day, and I have been to the Opera with you several times.†
Chpt 3

"Oh, I hope not!" murmured Lord Henry, who was scanning the occupants of the gallery through his opera-glass.†
Chpt 5

You must come and dine with me, and afterwards we will look in at the Opera.†
Chpt 6

And to-night I am to dine with you, and then go on to the Opera, and sup somewhere, I suppose, afterwards.†
Chpt 6

An hour later he was at the Opera, and Lord Henry was leaning over his chair.†
Chpt 6

"You went to the Opera?" said Hallward, speaking very slowly, and with a strained touch of pain in his voice.†
Chpt 7

You went to the Opera while Sibyl Vane was lying dead in some sordid lodging?†
Chpt 7

Yet, after some time, he wearied of them, and would sit in his box at the Opera, either alone or with Lord Henry, listening in rapt pleasure to "Tannhauser," and seeing in that great work of art a presentation of the tragedy of his own soul.†
Chpt 9

Definitions:

(1) (opera)
a musical play with orchestra in which most dialogue is sung -- (typically associated with classical music and often in a language foreign to the audience)

or:

the art form (or describing something as related to it) that consists of musical plays with orchestra in which most dialogue is sung
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Less commonly, the expression, soap opera, refers to a television or radio program that typically runs for many years and dramatizes the lives of a group of characters.