vi·​cen·​ni·​al vī-ˈse-nē-əl How to pronounce vicennial (audio)
: occurring once every 20 years

Word History


Late Latin vicennium period of 20 years, from Latin vicies 20 times + annus year; akin to Latin viginti twenty — more at vigesimal, annual

First Known Use

circa 1859, in the meaning defined above

Time Traveler
The first known use of vicennial was circa 1859

Dictionary Entries Near vicennial

Cite this Entry

“Vicennial.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2023.

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