'Firearm' definitions:

Definition of 'firearm'

From: WordNet
noun
A portable gun; "he wore his firearm in a shoulder holster" [syn: firearm, piece, small-arm]

Definition of 'Firearm'

From: GCIDE
  • Firearm \Fire"arm`\ (f[imac]r"[aum]rm`), n. A gun, pistol, or any weapon from which a shot is discharged by the force of an explosive substance, as gunpowder. [1913 Webster]