The Collaborative International Dictionary
Lustration \Lus*tra"tion\, n. [L. lustratio: cf. F. lustration.]
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The act of lustrating or purifying.
And holy water for lustration bring.
--Dryden. (Antiq.) A sacrifice, or ceremony, by which cities, fields, armies, or people, defiled by crimes, pestilence, or other cause of uncleanness, were purified.
Wiktionary
n. 1 (context religion English) A rite of purification, especially washing. 2 (context politics law English) The restoration of credibility to a government by the purging of perpetrators of crimes committed under an earlier regime.
Wikipedia
Lustration is the process of making something clear or pure, usually by means of a propitiatory offering.
It is also the purge of government officials once affiliated with the Communist system in Central and Eastern Europe. Various forms of lustration were employed in post-communist Europe. The concept might resemble de-Nazification in post-World War II Europe, and the de-Ba'athification in post-Saddam Hussein Iraq, and therefore resonates with concepts such as possible accountability for past human rights abuses, corruption or injustice. The term is taken from the Roman lustrum purification rituals.
Usage examples of "lustration".
As Raneb entered the drying shed, he consulted a sheet of papyrus containing a list of the dead, their dates of lustration and drying, and the name of the lector priest in charge of each.
Sacred baths and preparatory baptisms were used, lustrations, immersions, lustral sprinklings, and purifications of every kind.
The older authors quoted several such instances, and Mehliss says that in the ancient days certain writers remarked that catamenial lustration from the penis was inflicted on the Jews as a divine punishment.