/ Dictionary / Index S sundog: Meaning and Definition of Find definitions for: sun•dog Pronunciation: (sun'dôg", -dog"), [key] — n. parhelion. a small or incomplete rainbow. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sundog (Thesaurus) sun disk sundown Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language