Noun
(theater) The last time the curtain is lowered, after a performance and any curtain calls.
Antonym: curtain-raiser
(figuratively) The end to something that has lasted for a long time.
We're coming down to the final curtain of this whole palaver.
There are two sighs of relief every night in the life of an opera manager. The first comes when the curtain goes up The second sigh of relief comes when the final curtain goes down without any disaster, and one realizes, gratefully, that the miracle has happened again. Rudolf Bing