/ Dictionary / Index R racerunner: Meaning and Definition of Find definitions for: race•run•ner Pronunciation: (rās'run"ur), [key] — n. a whiptail lizard, Cnemidophorus sexlineatus, common in the eastern and central U.S., that runs with great speed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: racerunner (Thesaurus) race riot race suicide Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language