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centennial

Pronunciation: /sɛnˈtɛnɪəl/
chiefly North American
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Definition of centennial

adjective

  • relating to a hundredth anniversary: centennial celebrations

noun

  • a hundredth anniversary: the show is a celebration of the museum’s centennial

Origin:

late 18th century: from Latin centum 'a hundred', on the pattern of biennial

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centennial in other Oxford dictionaries

Definition of centennial in the US English dictionary