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.

Source: Webster's Revised Unabridged Dictionary (1913)