Operetta vs. Opera

Operetta and Opera Definitions
Operetta
A theatrical production that has many of the musical elements of opera but is lighter and more popular in subject and style and contains spoken dialogue. Also called light opera.
Opera
A theatrical presentation in which a dramatic performance is set to music.
Operetta
(music) A lighter version of opera with a frivolous story and spoken dialogue. 18
Opera
The score of such a work.
Operetta
A short, light, musical drama.
Opera
A theater designed primarily for operas.
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Operetta
A short amusing opera
Opera
A plural of opus.
Opera
A creative work, especially a musical composition numbered to designate the order of a composer's works.
Opera
(music) A theatrical work, combining drama, music, song and sometimes dance.
Opera
(music) The score for such a work.
Opera
A building designed for the performance of such works; an opera house.
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Opera
A company dedicated to performing such works.
Opera
(by extension) Any showy, melodramatic or unrealistic production resembling an opera.
Opera
Plural of opus; a collection of work.
Opera
A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arias, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama.
Opera
The score of a musical drama, either written or in print; a play set to music.
Opera
The house where operas are exhibited.
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Opera
A drama set to music; consists of singing with orchestral accompaniment and an orchestral overture and interludes
Opera
Theater where opera is performed