noun, plural lus·trums, lus·tra [luhs-truh] /ˈlʌs trə/.
Origin of lustrum
Examples from the Web for lustrum
One of the British novels with the highest sales hopes before Christmas is Lustrum by Robert Harris.
The lustrum which saw the birth of Robert Browning, that is the third in the nineteenth century, was a remarkable one indeed.Life of Robert Browning|William Sharp
It makes a lustrum in the Senate, and an era in the history of the Antislavery cause.Charles Sumner; his complete works, volume 6 (of 20)|Charles Sumner
They are charged as a result with making the lustrum, a great ceremony of purification which occurs every five years.History Of Ancient Civilization|Charles Seignobos
Nor had this lustrum of fierce contention wrought less upon his heart and intellect.
Let us sit with our hands on our mouths, a long, austere, Pythagorean lustrum.Phrases for Public Speakers and Paragraphs for Study|Compiled by Grenville Kleiser
British Dictionary definitions for lustrum
noun plural -trums or -tra (-trə)
Word Origin for lustrum
Word Origin and History for lustrum
(plural lustra), "purification of the Roman people every five years," 1580s, from Latin lustrum, perhaps from root of luere "to wash," related to lavere (see lave). Or [Watkins, Klein] from PIE *leuk-stro-, from base *leuk- "light, brightness."