firearmglossary / FIREARM firearm. A weapon that expels a projectile (such as a bullet or pellets) by the combustion of gunpowder or other explosive. [Cases: Weapons8. C.J.S. Weapons §§ 13–15.] 词条贡献者 双语律师Philipp,国际知名法学院法律专业,擅长翻译各类与医疗保健相关诉讼相关的法律文件。