lustrum

[ luhs-truhm ]

See synonyms for: lustrum lustra lustrums on Thesaurus.com

noun,plural lus·trums, lus·tra

[luhs-truh]. /ˈlʌs trə/.

a period of five years.
Roman History. a lustration or ceremonial purification of the people, performed every five years, after the taking of the census.

Origin of lustrum

First recorded in 1580–90; from Latin lūstrum; cf. luster¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use lustrum in a sentence

Thus passed away two lustra of her life, and as yet my daughter remained nameless upon the earth.
The Works of Edgar Allan Poe | Edgar Allan Poe
Lustra-cellulose prepared by spinning a solution of cellulose in concentrated chloride of zinc.
Researches on Cellulose | C. F. Cross
Concentrated nitric acid attacks the natural silks powerfully in the cold; the lustra-celluloses dissolve on heating.
Researches on Cellulose | C. F. Cross
The China silk was dissolved by this reagent; Tussah silk and the lustra-celluloses entirely resisted its action.
Researches on Cellulose | C. F. Cross
Millon's reagent, at the boiling solution, colours the natural silks violet: the lustra-celluloses give no reaction.
Researches on Cellulose | C. F. Cross

British Dictionary definitions for lustrum

lustrum

lustre

/ (ˈlʌstrəm) /

nounplural -trums or -tra (-trə)

a period of five years

Origin of lustrum

C16: from Latin: ceremony of purification, from lustrāre to brighten, purify

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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