bi ‧ cen ‧ te ‧ na ‧ ry /ˌbaɪsenˈtiːnəri $ -ˈtenəri, -ˈsent ə neri/ BrE AmE noun ( plural bicentenaries ) [countable]
especially British English the day or year exactly 200 years after an important event ⇨ centenary
bicentenary of
the bicentenary of Mozart’s death
—bicentenary adjective [only before noun]