Breadcrumb Home > Thesaurus > I Synonyms of imperium Find synonyms for: Noun 1. empire, imperium, domain, demesne, land usage: the domain ruled by an emperor or empress; the region over which imperial dominion is exercised 2. imperium, authority, authorization, authorisation, potency, dominance, say-so usage: supreme authority; absolute dominion WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of imperium (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: jactation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language