quatercentennial quatercentenary • quatern · · · Info · Definitions · Synonyms · Characters · · quatercentennial · · Text Latin · · Script 16 · · Length 6 · · Syllables Definitions · · · (noun) the 400th anniversary (or the celebration of it). Synonyms: quatercentenary. · · Noun Definition 1 Synonyms · · · quatercentenary · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E q latin small letter q U+0071 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075