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English definition of “centennial”

centennial

noun [C]  /senˈten·i·əl/ ( also centenary,  /senˈten·ə·ri, ˈsent·ənˌer·i/) us  
the day or year that is 100 years after a particular event, esp. an important one; the 100th anniversary : The sculpture commemorates Wyoming’s centennial.
(Definition of centennial from the Cambridge Academic Content Dictionary © Cambridge University Press)
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