firearm

noun

FY-ur-arm/ˈfaɪəɹˌɑː(ɹ)m/

1 meaning of firearm

1
nouncountable
A weapon like a gun that uses gunpowder to shoot out a small piece of metal.
Like a tool that uses a tiny explosion to push out a small piece of metal very fast.
The officer kept his firearm locked in a safe at home.
You need a license to own a firearm in many places.
Similargun, weapon

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Origin

It comes from "fire" (shooting) plus "arm" (a weapon).