Open English Wordnet
Nouns
(n)refining, refinement, purificationthe process of removing impurities (as from oil or metals or sugar etc.)
(n)purification, purgationa ceremonial cleansing from defilement or uncleanness by the performance of appropriate rites
(n)purificationthe act of purging of sin or guilt; moral or spiritual cleansing“purification through repentance”