/ Dictionary / Index Q quasiparticle: Meaning and Definition of Find definitions for: qua•si•par•ti•cle Pronunciation: (kwā"zī-pär'ti-kul, kwā"sī-, kwä"sē, -zē-), [key] — n. Physics. an entity, as an exciton or phonon, that interacts with elementary particles, but does not exist as a free particle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quasiparticle (Thesaurus) Quasimodo quasi-stellar object Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language