unleadedPronunciation: /ʌnˈlɛdɪd/Translate unleaded | into German | into Italian | into Spanish Definition of unleaded adjective 1(especially of petrol) without added lead. 2not covered, weighted, or framed with lead. 3 Printing (of type) with no space or leads added between lines. noun [mass noun] petrol without added lead: the car was converted to run on unleadedunleaded in other Oxford dictionaries Definition of unleaded in the US English dictionary