lustrum

/ˈlʌstrəm/
IPA guide

Other forms: lustrums

Definitions of lustrum
  1. noun
    a ceremonial purification of the Roman population every five years following the census
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    type of:
    ceremony
    the proper or conventional behavior on some solemn occasion
  2. noun
    a period of five years
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    type of:
    period, period of time, time period
    an amount of time
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