The Collaborative International Dictionary of English v.0.48:

Refinery \Re*fin"er*y\ (-?), n.; pl. Refineries (-?z). [Cf. F.
   raffinerie.]
   1. The building and apparatus for refining or purifying, esp.
      metals and sugar.
      [1913 Webster]

   2. A furnace in which cast iron is refined by the action of a
      blast on the molten metal.
      [1913 Webster]

WordNet (r) 3.0 (2006):

refinery
    n 1: an industrial plant for purifying a crude substance

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "refinery":
   armory, arsenal, assembly line, assembly plant,
   atomic energy plant, bindery, boatyard, boilery, bookbindery,
   brewery, brickyard, cannery, clarifier, colander, cradle, creamery,
   cribble, dairy, defense plant, distillery, dockyard, factory,
   factory belt, factory district, feeder plant, filter, flour mill,
   industrial park, industrial zone, lixiviator, main plant,
   manufactory, manufacturing plant, manufacturing quarter, mill,
   mint, munitions plant, oil refinery, packing house, percolator,
   plant, pottery, power plant, production line, purifier,
   push-button plant, refiner, riddle, rocker, sawmill, screen,
   shipyard, sieve, sifter, strainer, subassembly plant,
   sugar refinery, tannery, winery, winnow, winnowing basket,
   winnowing fan, winnowing machine, yard, yards