racingPronunciation: /ˈreɪsɪŋ/Translate racing | into French | into German | into Italian | into Spanish Definition of racing noun [mass noun] short for horse racing. any sport that involves competing in races:cycle racing yacht racing adjective 1moving swiftly:he controlled his racing thoughts 2(of a person) following horse racing:Kevin was not a racing manracing in other Oxford dictionaries Definition of racing in the US English dictionary