D defs.my
Entry 1 sense Webster, 1913

Trilogy

/trĭl'-əj-ē/ · Tril·o·gy · IPA /ˈtɹɪləd͡ʒi/
01 n. A series of three dramas which, although each of them is in one sense complete, have a close mutual relation, and form one historical and p…
  1. 1.
    A series of three dramas which, although each of them is in one sense complete, have a close mutual relation, and form one historical and poetical picture. Shakespeare's “ Henry VI.” is an example.
    “On the Greek stage, a drama, or acted story, consisted in reality of three dramas, called together a trilogy, and performed consecutively in the course of one day.” Coleridge.