Breadcrumb Home > Thesaurus > P Synonyms of portcullis Find synonyms for: Noun1. portcullis, gateusage: gate consisting of an iron or wooden grating that hangs in the entry to a castle or fortified town; can be lowered to prevent passageWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of portcullis (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