/ Thesaurus / I Synonyms of in chief Find synonyms for: Adjective1. in-chief(postnominal), important (vs. unimportant), of importusage: indicating the head of a staff; "editor-in-chief"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language