Decennial Definition

dĭ-sĕnē-əl
adjective
Lasting ten years.
Webster's New World
Happening every ten years.
Webster's New World
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noun
A tenth anniversary or its commemoration.
Webster's New World
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Other Word Forms of Decennial

Noun

Singular:
decennial
Plural:
decennials

Origin of Decennial

  • From Latin decennium a period of ten years decennium

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin decennialis, French decem ten + ennius year- -ly

    From Wiktionary

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