Breadcrumb Home > Thesaurus > T Synonyms of trilogy Find synonyms for: Noun 1. trilogy, trio, triad, triplet, triple usage: a set of three literary or dramatic works related in subject or theme WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of trilogy (Dictionary) ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language