/ Thesaurus / A Synonyms of authoritatively Find synonyms for: Adverb1. authoritatively, magisteriallyusage: in an authoritative and magisterial manner; "she spoke authoritatively"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language