act curtain

act curtain, act drop, front curtain, house curtain

A curtain, behind the asbestos curtain in a theater, which closes the proscenium and serves as an indication of the beginning or end of an act or scene.
References in periodicals archive ?
Horrified husband Ian, 57, saw 4ft 5ins Janette tumble after the first act curtain fell but the 700 strong audience did not see the accident.
The first act curtain falls on the play's melodramatic high point: Crackerjack has left the crisis center, and by the time Ramon and Grace find him on the street, he's dying of a drug overdose.