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centenary (adj.)
1640s, "relation to or consisting of 100 years," from Latin centenarius "of a hundred, relating to a hundred," from centenai "a hundred each," from centum "hundred" (see hundred).
As a noun, c. 1600 as "period of 100 years;" 1788 as "a hundredth anniversary, commemoration or celebration of a hundredth anniversary." The usual British word in this sense for the American centennial.
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Definitions of centenary
Dictionary entries near centenary
cent
centaur
centaury
centavo
centenarian
centenary
centennial
center
center-field
centerfold
centerpiece