society > armed hostility > military equipment > weapon > device for discharging missiles > firearm > [noun] > type of firearm > spring- or trap-gun (3)
†(a) a spring gun used as guard against trespassers; (b) Nautical (see quot. 1815).
A booby trap consisting of a gun equipped with a triggering device, such as a trip wire, designed to cause it to fire when a person or animal…
(a) (see quot. 1964); (b) a shotgun used in trap-shooting.