/kwin'sen ten"euh ree, kwin sen"tn er'ee/ ; esp. Brit. /kwin'sen tee"neuh ree/ , n. , pl. quincentenaries , adj.
n.
1. a 500th anniversary or its celebration.
adj.
2. pertaining to or marking a period of 500 years; quincentennial.
[ QUIN(QUE-) + CENTENARY ]