Source : Webster's Revised Unabridged Dictionary (1913)

Firing \Fir"ing\, n.
   1. The act of disharging firearms.

   2. The mode of introducing fuel into the furnace and working
      it. --Knight.

   3. The application of fire, or of a cautery. --Dunglison.

   4. The process of partly vitrifying pottery by exposing it to
      intense heat in a kiln.

   5. Fuel; firewood or coal. [Obs.] --Mortimer.

   {Firing iron}, an instrument used in cauterizing.