Reformer
Pronunciation : Re*form"er (r*frm"r)
Part of Speech : n.
Definition : 1. One who effects a reformation or amendment; one who labors for, or urges, reform; as, a reformer of manners, or of abuses.
2. (Eccl.Hist.)
Defn: One of those who commenced the reformation of religion in the sixteenth century, as Luther, Melanchthon, Zwingli, and Calvin.
Source : Webster's Unabridged Dictionary, 1913