From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( a.) 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.

(2): ( a.) Retained in service on half or full pay after the disbandment of the company or troop; - said of an officer.

(3): ( a.) Amended in character and life; as, a reformed gambler or drunkard.

King James Dictionary [2]

Reform'Ed, pp. Corrected amended restored to a good state as a reformed profligate the reformed church.