# lustrum

> English word · Noun · IPA /ˈlʌstɹəm/

## Definitions
1. A lustration: a ceremonial purification of the people of Rome performed every five years after the census.
2. Synonym of quinquennium: Any 5-year period.

## Etymology
From Latin lūstrum.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/lustrum