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decennium

noun
de·​cen·​ni·​um | \ di-ˈse-nē-əm How to pronounce decennium (audio) \
plural decenniums or decennia\ di-​ˈse-​nē-​ə How to pronounce decennia (audio) \

Definition of decennium

: a period of 10 years : decade

Examples of decennium in a Sentence

Recent Examples on the Web

 According to design firm Bagaar's blog: Over the past decennium, users have grown accustomed to certain design patterns: positions, colors, icons... — Samuel Axon, Ars Technica, "Behold, the most (intentionally) poorly designed website ever created," 4 July 2019

First Known Use of decennium

1685, in the meaning defined above

History and Etymology for decennium

Latin, from decem + annus year — more at annual

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