Decennium Definition

dĭ-sĕnē-əm
decennia, decenniums
noun
Webster's New World
A period of ten years; a decade.
American Heritage
Synonyms:

Other Word Forms of Decennium

Noun

Singular:
decennium
Plural:
decennia, decenniums

Origin of Decennium

  • Latin from decennis lasting for ten years decem ten dekm̥ in Indo-European roots annus year at- in Indo-European roots

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

  • From Latin decem (“ten”) + annum (“year”).

    From Wiktionary

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decennium