racerunnerPronunciation: /ˈreɪsrʌnə/Definition of racerunner noun any of a number of fast-moving active lizards with longitudinal markings and a pointed snout, in particular: an American lizard (genus Cnemidophorus, family Teiidae). (desert racerunner) an East European lizard (Eremias arguta, family Lacertidae). racerunner in other Oxford dictionaries Definition of racerunner in the US English dictionary