Trĭl'o-ġy, n.

n. [Fr. trilogie, Gr. τριλογία, from τρι, τρίς, three, thrice, and λόγος, speech, discourse.] A series of three dramas, which, although each of them is in one sense complete, yet bear a mutual relation, and form but parts of 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.