Source : Webster's Revised Unabridged Dictionary (1913)

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.

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

Source : WordNet®

refinery
     n : an industrial plant for purifying a crude substance