/ Thesaurus / P Synonyms of postillion Find synonyms for: Noun1. postilion, postillion, horseman, equestrian, horseback riderusage: someone who rides the near horse of a pair in order to guide the horses pulling a carriage (especially a carriage without a coachman)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: bibliophile Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language