Princeton's WordNet

1. reformer, reformist, crusader, social reformer, meliorist(noun)

   a disputant who advocates reform

2. reformer(noun)

   an apparatus that reforms the molecular structure of hydrocarbons to produce richer fuel

   "a catalytic reformer"

Wiktionary

1. reformer(Noun)

   One who reforms, or who works for reform.

2. reformer(Noun)

   One who was involved in the Reformation.

3. reformer(Noun)

   A device which converts hydrocarbons into a hydrogen-rich mixture of gases.

4. reformer(Noun)

   A device used to convert petroleum refinery naphthas, typically having low octane ratings, into high-octane liquid products called reformates.

Webster Dictionary

1. Reformer(noun)

   one who effects a reformation or amendment; one who labors for, or urges, reform; as, a reformer of manners, or of abuses

2. Reformer(noun)

   one of those who commenced the reformation of religion in the sixteenth century, as Luther, Melanchthon, Zwingli, and Calvin

The Roycroft Dictionary

1. reformer

   1. One who causes the rich to band themselves against the poor. 2. One who educates the people to appreciate the things they need.

The Foolish Dictionary, by Gideon Wurdz

1. REFORMER

   One who, when he smells a rat, is eager to let the cat out of the bag.

• hervormerAfrikaans
• مُصْلِحArabic
• реформаторBulgarian
• reformadorPortuguese (BR)
• reformátor, -kaCzech
• der/die Reformer(in)German
• reformatorDanish
• αναμορφωτής, μεταρρυθμιστήςGreek
• reformadorSpanish
• uuendajaEstonian
• اصلاح طلبFarsi
• uudistajaFinnish
• réformateur/-triceFrench
• מְתֵקן חֶברָתִיHebrew
• सुधारने वालाHindi
• reformatorCroatian
• reformerHungarian
• pembaharuIndonesian
• umbótasinniIcelandic
• riformatore, riformatriceItalian
• 改革者Japanese
• 혁신자Korean
• reformatorius, pertvarkytojasLithuanian
• reformators, reformu piekritējsLatvian
• pengubahMalay
• hervormerDutch
• reformatorNorwegian
• reformatorPolish
• اصلاح طلبPersian
• اصلاحPashto
• reformadorPortuguese
• reformatorRomanian
• реформаторRussian
• reformátor, -kaSlovak
• reformatorSlovenian
• reformatorSerbian
• reformatorSwedish
• คนที่ทำการปฏิรูปThai
• reformcuTurkish
• 改革者Chinese (Trad.)
• перетворювач; реформаторUkrainian
• مصلحUrdu
• người thực hiện cải cáchVietnamese
• 改革者Chinese (Simp.)