drop curtain

US /drɑːp ˈkɜːr.tən/
UK /drɑːp ˈkɜːr.tən/
"drop curtain" picture
1.

a curtain that is lowered onto a stage to separate it from the audience or to mark the end of a performance

:
The drop curtain fell, signaling the end of the play.
The stagehands prepared the drop curtain for the next act.