Source : Webster's Revised Unabridged Dictionary (1913)

Compurgation \Com`pur*ga"tion\, n. [L. compurgatio, fr.
   compurgare to purify wholly; com- + purgare to make pure. See
   Purge, v. t.]
   1. (Law) The act or practice of justifying or confirming a
      man's veracity by the oath of others; -- called also
      {wager of law}. See {Purgation}; also {Wager of law},
      under {Wager}.

   2. Exculpation by testimony to one's veracity or innocence.

            He was privileged from his childhood from suspicion
            of incontinency and needed no compurgation. --Bp.
                                                  Hacket.