An event consisting of level setting
The set of values x for which a real-valued function f(x) is equal to a given constant.
A state of mutual understanding among parties
To establish a baseline of mutual understanding
The score for such a work.
A building designed for the performance of such works; an opera house.
A theatrical work, combining drama, music, song and sometimes dance.
Any showy, melodramatic or unrealistic production resembling an opera.
A company dedicated to performing such works.