pig-a-back pi·ga·back uncommon adverb 1. on a railroad flatcar “the trailer rode piggyback across the country” Synonymspiggybackpickaback 2. on the back or shoulder or astraddle on the hip “she carried her child piggyback” Synonymspiggybackpickaback WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
