What does "purify" mean?

Purify: Hence, in figurative uses: (a) To free from guilt or moral defilement; as, to purify the heart. And fit them so Purified to receive him pure. Milton. (b) To free from ceremonial or legal defilement. And Moses took the blood, and put it upon the horns of the altar, . . . and purified the altar. Lev. viii.

Additional senses

  1. 2.Purify both yourselves and your captives. Num. xxxi.
  2. 3.(c) To free from improprieties or barbarisms; as, to purify a language. Sprat.
  3. 4.To grow or become pure or clear.

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