Breadcrumb Home > Thesaurus > P Synonyms of prism Find synonyms for: Noun1. prism, polyhedronusage: a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms2. prism, optical prism, optical deviceusage: optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an imageWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of prism (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