Definition of centennial noun from the Oxford Advanced Learner's Dictionary

 

centennial

 noun
noun
BrE BrE//senˈteniəl//
 
; NAmE NAmE//senˈteniəl//
 
(especially North American English)(usually British English centenary)
 
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the 100th anniversary of an event The year 1889 was the centennial of the inauguration of George Washington. see also bicentennial Word Origin late 18th cent.: from Latin centum ‘a hundred’, on the pattern of biennial.
See the Oxford Advanced American Dictionary entry: centennial

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