Definition of screw gun in US English:

screw gun

noun

  • 1A breech-loading gun, the barrel and stock of which are joined by a screw; especially (in later use) a cannon or large gun which unscrews into separate parts for ease of transport. Now chiefly historical.

  • 2An electrically-powered hand-held device used to turn a screw into or out of its place, typically resembling and operating in a way similar to a power drill.

Origin

Late 17th century. From screw + gun.

Pronunciation

screw gun

/ˈskruː ɡʌn/