Source : Webster's Revised Unabridged Dictionary (1913)

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.

   2. (Med.) To operate on as, or by means of, a cathartic
      medicine, or in a similar manner.

   3. To clarify; to defecate, as liquors.

   4. To clear of sediment, as a boiler, or of air, as a steam
      pipe, by driving off or permitting escape.

   5. To clear from guilt, or from moral or ceremonial
      defilement; as, to purge one of guilt or crime.

            When that he hath purged you from sin. --Chaucer.

            Purge me with hyssop, and I shall be clean. --Ps.
                                                  li. 7.

   6. (Law) To clear from accusation, or the charge of a crime
      or misdemeanor, as by oath or in ordeal.

   7. To remove in cleansing; to deterge; to wash away; -- often
      followed by away.

            Purge away our sins, for thy name's sake. --Ps.
                                                  lxxix. 9.

            We 'll join our cares to purge away Our country's
            crimes.                               --Addison.

Purging \Pur"ging\, a.
   That purges; cleansing.

   {Purging flax} (Bot.), an annual European plant of the genus
      {Linum} ({L. catharticum}); dwarf wild flax; -- so called
      from its use as a cathartic medicine.

Purging \Pur"ging\, n. (Med.)
   The act of cleansing; excessive evacuations; especially,
   diarrhea.

Source : WordNet®

purging
     adj : serving to purge or rid of sin; "purgatorial rites" [syn: {purgatorial},
            {purifying}]

purging
     n 1: an act of removing by cleansing; ridding of sediment or
          other undesired elements [syn: {purge}]
     2: the act of clearing yourself (or another) from some stigma
        or charge [syn: {purge}, {purgation}]