gun NOUN 1) a weapon incorporating a metal tube from which bullets or shells are propelled by explosive force. 2) a device for discharging something (e.g. grease) in a required direction. 3) N. Amer. a gunman: a hired gun.
VERB (gunned, gunning) 1) (gun down) shoot with a gun. 2) (gun for) aggressively pursue or act against. 3) informal cause (an engine) to race.
go great guns — Cf. ↑go great guns
jump the gun — Cf. ↑jump the gun
stick to one's guns — Cf. ↑stick to one's guns
ORIGIN perhaps from a familiar form of the Scandinavian name Gunnhildr, from gunnr + hildr, both meaning 'war' .

English terms dictionary. 2015.