A vocal performance with no instrumental accompaniment.
Singing solely or mainly without instrumental accompaniment.
Related to a form of purely vocal music mostly associated with American college performance groups.
In a manner of a choir with no instrumental accompaniment; literally, "in the style of the (Sistine) Chapel (in Rome)", such as a musical Mass done a cappella.
A theatrical work, combining drama, music, song and sometimes dance.
A building designed for the performance of such works; an opera house.
The score for such a work.
Any showy, melodramatic or unrealistic production resembling an opera.
A company dedicated to performing such works.