Source : Webster's Revised Unabridged Dictionary (1913)

Reformed \Re*formed"\ (r?*f?rmd"), a.
   1. Corrected; amended; restored to purity or excellence;
      said, specifically, of the whole body of Protestant
      churches originating in the Reformation. Also, in a more
      restricted sense, of those who separated from Luther on
      the doctrine of consubstantiation, etc., and carried the
      Reformation, as they claimed, to a higher point. The
      Protestant churches founded by them in Switzerland,
      France, Holland, and part of Germany, were called the
      Reformed churches.

            The town was one of the strongholds of the Reformed
            faith.                                --Macaulay.

   2. Amended in character and life; as, a reformed gambler or
      drunkard.

   3. (Mil.) Retained in service on half or full pay after the
      disbandment of the company or troop; -- said of an
      officer. [Eng.]

Source : WordNet®

Reformed
     adj 1: of or relating to the body of Protestant Christianity
            arising during the Reformation; used of some
            Protestant churches especially Calvinist as distinct
            from Lutheran; "Dutch Reformed theology"
     2: caused to abandon an evil manner of living and follow a good
        one; "a reformed drunkard"