/ Thesaurus / B Synonyms of barndoor Find synonyms for: Noun1. barndoor, flapusage: an opaque adjustable flap on a lamp fixture; used in photography to cut off light from particular areasWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language