Lustrum meaning

lŭstrəm
A period of five years.
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In ancient Rome, a purification of all the people by means of ceremonies held every five years, after the census.
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A five-year period.
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A ceremonial purification of the entire ancient Roman population after the census every five years.
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(Roman religion) A lustration or ceremonial purification of all the ancient Roman people, performed every five years, after the taking of the census.
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A period of five years.
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Other Word Forms

Noun

Singular:
lustrum
Plural:
lustra

Origin of lustrum

  • Latin lūstrum luster

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

  • From Latin lustrum (“period of five years").

    From Wiktionary