The Collaborative International Dictionary of English v.0.48:

Purge \Purge\, v. t. [imp. & p. p. Purged; p. pr. & vb. n.
   Purging.] [F. purger, L. purgare; purus pure + agere to
   make, to do. See Pure, and Agent.]
   1. To cleanse, clear, or purify by separating and carrying
      off whatever is impure, heterogeneous, foreign, or
      superfluous. "Till fire purge all things new." --Milton.
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   2. (Med.) To operate on as, or by means of, a cathartic
      medicine, or in a similar manner.
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   3. To clarify; to defecate, as liquors.
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   4. To clear of sediment, as a boiler, or of air, as a steam
      pipe, by driving off or permitting escape.
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   5. To clear from guilt, or from moral or ceremonial
      defilement; as, to purge one of guilt or crime.
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            When that he hath purged you from sin. --Chaucer.
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            Purge me with hyssop, and I shall be clean. --Ps.
                                                  li. 7.
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   6. (Law) To clear from accusation, or the charge of a crime
      or misdemeanor, as by oath or in ordeal.
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   7. To remove in cleansing; to deterge; to wash away; -- often
      followed by away.
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            Purge away our sins, for thy name's sake. --Ps.
                                                  lxxix. 9.
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            We 'll join our cares to purge away
            Our country's crimes.                 --Addison.
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Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "purged":
   banned, barred, bowdlerized, cleaned, cleaned up, cleansed,
   debarred, deported, ejected, excluded, exiled, expelled,
   expurgated, left out, liquidated, not in it, not included,
   precluded, prohibited, purified, refined, reformed, shut out,
   spruce, tabooed, tidy