unleaded gasoline unleaded • unleaded petrol · · · Info · Definitions · Synonyms · Antonyms · Characters · · unleaded gasoline · · Text Common · · Latin · · Scripts 17 · · Length 6 · · Syllables Definitions · · · (noun) gasoline that has not been treated with a lead compound. Synonyms: unleaded gasoline, unleaded petrol. · · Noun Definition 1 Synonyms · · · unleaded petrol · · Synonym 1 Antonyms · · · leaded gasoline · · Antonym 0 leaded petrol · · Antonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075