(1):

(n.) A cleansing from guilt or the pollution of sin; the extinction of sinful desires, appetites, and inclinations.

(2):

(n.) The act of purifying; the act or operation of separating and removing from anything that which is impure or noxious, or heterogeneous or foreign to it; as, the purification of liquors, or of metals.

(3):

(n.) The act or operation of cleansing ceremonially, by removing any pollution or defilement.