(ancient drama) The second part of a play, in which the action begins.
1760, Laurence Sterne, The Life & Opinions of Tristram Shandy, Gentleman, Penguin, page 88:
How my uncle Toby and Corporal Trim managed this matter,—with the history of their campaigns, which were no way barren of events,—may make no uninteresting under-plot in the epitasis and working up of this drama.
1922, James Joyce, Ulysses:
It doubles itself in the middle of his life, reflects itself in another, repeats itself, protasis, epitasis, catastasis, catastrophe.
(rhetoric) The addition of a concluding sentence that merely emphasizes what has already been stated.