From Latin lustrum (“period of five years”).
lustrum (plural lustra or lustrums)
- (Roman religion) A lustration or ceremonial purification of all the ancient Roman people, performed every five years, after the taking of the census.
- A period of five years.
- 1835, Edgar Allan Poe, Morella, Tales of Mystery and Imagination, Folio Society 2007, p. 31:
- Thus passed away two lustra of her life, and, as yet, my daughter remained nameless upon the earth.
- 1985, John Fowles, A Maggot:
- Q. Now, sir, if you would be so kind as to guess upon his age. A. Forty five years are certain. I would guess a lustrum more.
Alternation from earlier dustrum (rare), from Ancient Greek δύστρον (dústron) from δύω (“to plunge”).
lustrum n (genitive lustrī); second declension
- bog, morass, place where boars and swine wallow
- (chiefly in the plural) den of wild beasts; wood, forest
- (chiefly in the plural) (a place of) debauchery
lūstrum n (genitive lustrī); second declension
- a purificatory sacrifice or lustration performed every five years by the censor
- a period of five years
- “lustrum” in Charlton T. Lewis & Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879.
- “lustrum” in Félix Gaffiot (1934), Dictionnaire Illustré Latin-Français, Paris: Hachette.
- Meissner, Carl; Auden, Henry William (1894) Latin Phrase-Book, London: Macmillan and Co.
- to complete the censorship (by certain formal purificatory ceremonies = lustro faciendo): lustrum condere (Liv. 1. 44. 2)
- Andrew L. Sihler (1995) New Comparative Grammar of Greek and Latin, New York, Oxford, Oxford University Press
- Julius Pokorny (1959), Indogermanisches etymologisches Wörterbuch, in 3 vols, Bern, München: Francke Verlag
- ^ “lustro 3” in: Alberto Nocentini, Alessandro Parenti, “l'Etimologico — Vocabolario della lingua italiana”, Le Monnier, 2010, ISBN 978-88-00-20781-2