quadrillion quadrilled • quadrillionth · · · Info · Definitions · Characters · · quadrillion · · Text Latin · · Script 11 · · Length Definitions · · · (noun) the number that is represented as a one followed by 24 zeros. Example: "In england they call a septillion a quadrillion." · · Noun Definition 1 (noun) the number that is represented as a one followed by 15 zeros. · · Noun Definition 2 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 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 q latin small letter q U+0071 r latin small letter r U+0072 u latin small letter u U+0075