lustrum
1
9.9
A period of five years often used in Roman times
- noun
- /ˈlʌstrəm/
- Archaic
:
lustrum
- Five years or half a decade is a lustrum.
Examples
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Well, I've been doing that for ten lustrums.
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The professor explained that a lustrum is equivalent to five years, particularly when discussing historical events.
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Probably got another lustrum in me.
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You have been in the service of this court for almost two lustrums.
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In ancient Rome, each five-year period known as a lustrum was marked by significant societal changes.
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Many people set long-term goals to be achieved every five years, often referring to each period as a lustrum.
How Long
Surface Forms
Etymology
Lustrum also came to mean a period of 'five years' because that cleansing ceremony was done every five years, so people began to use the same word for the time between those ceremonies.