operas is a form of:

Opera



Plural form of: opus
noun
1.
(musical drama, the theater where opera is performed) Western opera សង្គីតនាដន៍ (អូប៉េរ៉ា), opera glasses កែវយឺតតូចៗ, Cambodian opera ល្ងោន
ENGLISH MEANING
noun
1.
A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arials, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama.
2.
The score of a musical drama, either written or in print; a play set to music.
3.
The house where operas are exhibited.