quadrennium quadrennially • quadriad · · · Info · Definitions · Characters · · quadrennium · · Text Latin · · Script 11 · · Length Definitions · · · (noun) a period of four years. · · Noun Definition 1 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E q latin small letter q U+0071 r latin small letter r U+0072 u latin small letter u U+0075