There are 2 definitions of centennial in English:

centennial1

Syllabification: cen·ten·ni·al
Pronunciation: /senˈtenēəl
 
/
chiefly North American

adjective

Of or relating to a hundredth anniversary: centennial celebrations
More example sentences
  • His explanation that the money saved would be budgeted towards the city's centennial celebration on New Year's didn't wash with angry citizens.
  • By 1976, the year ACS celebrated its centennial anniversary, membership in the organization had grown to over 112,000 chemists, chemical engineers, and chemistry students.
  • Klein announced the final $3 billion on the debt would be paid in full in time for the province's centennial celebrations next year.

noun

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A hundredth anniversary: the museum’s centennial
More example sentences
  • CRT will develop and implement a detailed and wide-ranging plan to increase awareness of centennial events and the centennial itself, which will occur on December 17, 2003.
  • One could hardly hope to commemorate Isabella Stewart Gardner and the centennial of her museum more suitably than through the remembrance of one of her most prestigious renaissance peers.
  • The centennial and bicentennial of Columbus's legendary voyages passed largely unmarked in the colonies.

Origin

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

Definition of centennial in:

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Word of the day antebellum
Pronunciation: ˌantēˈbeləm
adjective
occurring or existing before a particular war…

There are 2 definitions of centennial in English:

Centennial2

Syllabification: Cen·ten·ni·al
Pronunciation: /senˈtenēəl
 
/
A city in north-central Colorado, governed by home rule; population 99,680 (est. 2008).