say it: ri-FAWR-mur
reformer is a noun meaning "a disputant who advocates reform". It carries 2 recorded senses.
a disputant who advocates reform
an apparatus that reforms the molecular structure of hydrocarbons to produce richer fuel
“a catalytic reformer”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for reformer come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.