Meaning of “bicentenary” - Learner’s Dictionary

bicentenary

noun [ C ] uk us /ˌbaɪsenˈtiːnəri/ US  /baɪˈsentəneri/ UK (US bicentennial, us US  /ˌbaɪsenˈteniəl/)

the day or year that is 200 years after an important event:

the bicentenary of Schubert's birth
bicentennial celebrations

(Definition of “bicentenary” from the Cambridge Learner’s Dictionary © Cambridge University Press)