Apron stage
Appearance
The apron is any part of the stage that extends past the proscenium arch and into the audience or seating area. The Elizabethan stage, which was a raised platform with the audience on three sides, is the outstanding example.
Most stages edges are curved slightly outward providing a very small apron. Some have a large playing space protruding into the audience and in turn a very large apron.
An apron stage can also be another name for a thrust stage.