lustrum
/ˈlʌstɹəm/ noun
Forms lustra lustrums
- noun (historical) A lustration: a ceremonial purification of the people of Rome performed every five years after the census.
- noun (by extension, literary) Synonym of quinquennium: Any 5-year period.
Synonyms
Etymology
From Latin lūstrum.
Webster’s 1913
- noun A lustration or purification, especially the purification of the whole Roman people, which was made by the censors once in five years. Hence: A period of five years.
Etymology [L. Cf. 2d & 3d Luster.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “lustrum”, CC BY-SA 4.0. Details