To make pure or clear; free from contamination or extraneous admixture: as, to purify liquors or metals; to purify the blood; to purify the air.To make ceremonially clean; cleanse or free from whatever pollutes or renders ceremonially unclean and unfit for sacred service.To free from guilt, or the defilement of sin; free from whatever is sinful, vile, or base.To elevate and free from barbarisms or inelegances: as, to purify a language.To grow or become pure or clear.