I. noun
( -s )
Etymology: Middle English, from gerund of firen to fire — more at fire
1. : the act or an instance of treating, preparing, or curing by heat ; specifically : the process of maturing ceramic products by the application of heat
2. : firewood , coal , fuel
3. : the burning or scorching of plants especially by unfavorable soil conditions or other environmental conditions
II. adjective
Etymology: from present participle of fire (II)
: of or relating to the operation or operating parts of a firearm
firing cycle
firing mechanism