Source : Webster's Revised Unabridged Dictionary (1913)

Lustration \Lus*tra"tion\, n. [L. lustratio: cf. F. lustration.]
   1. The act of lustrating or purifying.

            And holy water for lustration bring.  --Dryden.

   2. (Antiq.) A sacrifice, or ceremony, by which cities,
      fields, armies, or people, defiled by crimes, pestilence,
      or other cause of uncleanness, were purified.