/ ˌbaɪsenˈtiːnəri; NAmE -ˈten-/ noun
( pl. -ies ) ( BrE ) ( NAmE bi·cen·ten·nial ) the year, or the day, when you celebrate an important event that happened exactly 200 years earlier
► bi·cen·ten·ary adjective [ only before noun ]:
bicentenary celebrations