Breadcrumb Home > Thesaurus > P Synonyms of postmillennial Find synonyms for: Adjective1. postmillennialusage: of or relating to the period following the millenniumWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of postmillennial (Dictionary) ✖ Related Content Daily Word Quiz: perambulate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language