As nouns the difference between auditorium and theater. is that auditorium is a large room for public meetings or performances while theater is a place or building, consisting of a stage and seating, in which an audience gathers to watch plays, musical performances, public ceremonies, and so on.What are the parts of a theater stage?
Upstage, Centerstage, and Downstage are horizontal divisions of the theater stage. Vertically, the stage is divided into five columns: Stage Right, Stage Right Center, Stage Center, Stage Left Center and Stage Right. The vertical and horizontal division help the actors change their positions, or move to different area of the stage.