Breadcrumb Home > Thesaurus > P Synonyms of postern Find synonyms for: Noun1. postern, gateusage: a small gate in the rear of a fort or castleWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of postern (Dictionary) ✖ Related Content Daily Word Quiz: tautology Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language