Someone who has a small role in a show and also can cover for one or more other (usually larger) roles.

To sing out loudly, strongly, and clearly, so that one's voice is projected to the back of the balcony. Usually said of a woman. Ethel Merman was a belter. Liza Minelli is a belter. Gwen Verdon w [..]

The actual story of a musical; the play part.

The payoff moment in a song; the moment when the song is "buttoned up" and finished.

A recording of a stage production, usually a musical or revue (though sometimes you get cast albums of background/mood music, as with The Green Bird

All the people associated with a musical.

A musical in which the idea or concept takes precedence over the plot; usually a nonlinear story, or one that incorporates several threads. A Chorus Line

A ballet within a musical that expresses the hopes and dreams (or the actual dreams) of a character, often the ingenue

My own term for any musical done by Lloyd Webber or Boubil & Schonberg. Alternately, anything reminiscent of Phantom

A flop operetta