/ Dictionary / Index Q quasar: Meaning and Definition of Find definitions for: qua•sar Pronunciation: (kwā'zär, -zur, -sär, -sur), [key] — n. Astron. one of over a thousand known extragalactic objects, starlike in appearance and having spectra with characteristically large redshifts, that are thought to be the most distant and most luminous objects in the universe. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quasar (Thesaurus) quartz plate quash Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language