Breadcrumb Home > Thesaurus > P Synonyms of pillion Find synonyms for: Noun1. pillion, seatusage: a seat behind the rider of a horse or motorbike etc.WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of pillion (Dictionary) ✖ Related Content Daily Word Quiz: solecism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language