quincentennial

Noun quincentennial has 1 sense

• quincentennial(n = noun.time) quincentenary - the 500th anniversary (or the celebration of it);
is a kind of anniversary, day of remembrance

Adjective quincentennial has 1 sense

• quincentennial(a = adj.pert) quincentenary - of or relating to a 500th anniversary; "the quincentennial celebration of the founding of the city"