/ˌbaɪsenˈti:nəri ||; baɪˈsɛntəˌnɛrɪ/noun [C] (pluralbicentenaries) (US 美 bicentennial /ˌbaɪsenˈteniəl ||; ˌbaɪsɛnˈtɛnɪəl/) the day or the year two hundred years after sth happened or began 二百周年；二百周年纪念: the bicentenary of the French Revolution法国大革命二百周年纪念