WordReference Random House Unabridged Dictionary of American English © 2026
quad•ri•cen•ten•ni•al
(kwod′rə sen ten′ē əl),USA pronunciation adj.
n.
- of, pertaining to, or marking the completion of a period of four hundred years.
n.
- a quadricentennial anniversary.
- its celebration.
- quadri- + centennial 1880–85