final curtain

:  not to be altered or undone

:  of or relating to a concluding court action or proceeding

:  coming at the end :  being the last in a series, process, or progress

:  something that is final: such as

:  a hanging screen usually capable of being drawn back or up

:  window drapery

:  a device or agency that conceals or acts as a barrier — compare iron curtain

:  to furnish with or as if with curtains

:  to veil or shut off with or as if with a curtain