outroduction
The closing remarks made at the end of a book, story, performance, etc.
rare
And I well remember that when I visited Elizabeth in her German Garden, during the early years of the April, May, and June babies, those charming young persons were in the habit of writing not only introductions but "outroductions" to their own manuscript novels. Perhaps they may as well furnish an "outroduction" to this essay.
Where it comes from
Blend of out + introduction, back-formation from outro.
Adapted from the Wiktionary entry outroduction (CC BY-SA 4.0).