Source : Webster's Revised Unabridged Dictionary (1913)

Fining \Fin"ing\, n.
   1. The act of imposing a fin?.

   2. The process of fining or refining; clarification; also
      (Metal.), the conversion of cast iron into suitable for
      puddling, in a hearth or charcoal fire.

   3. That which is used to refine; especially, a preparation of
      isinglass, gelatin, etc., for clarifying beer.

   {Fining pot}, a vessel in which metals are refined. --Prov.
      xvii. 3.