n.1 the discharging of guns.
2 material for a fire, fuel.
3 the heating process which hardens clay into pottery etc.
Phrases and idioms:
firing-line
1. the front line in a battle.
2 the leading part in an activity etc. firing-party a group detailed to fire the salute at a military funeral.
firing-squad
1. a group detailed to shoot a condemned person.
2 a firing-party. firing-step a step on which soldiers in a trench stand to fire.