We've found 3 phrases for theatre (0.116 seconds):

fourth wall »    The imaginary invisible wall at the front of the stage in a proscenium theatre, through which the audience sees the action in the world of the play.

second banana »    A comedian who plays a secondary or supporting role, especially as straight man and traditionally in vaudeville or burlesque theatre.

take a bow »    To accept applause at the end of a performance in a theatre. Often this includes actually bowing to the audience.

BTW, Why won't you become an editor?