- One who effects a reformation or amendment; one who
labors for, or urges, reform; as, a reformer of manners, or of abuses. - One of those who commenced the reformation of religion in
the sixteenth century, as Luther, Melanchthon, Zwingli, and Calvin.
Meaning of 'reformer' (Princeton's WordNet)
1 . reformer
[ n]
Meaning (1): - an apparatus that reforms the molecular structure of hydrocarbons to produce richer fuel