From Longman Dictionary of Contemporary Englishsubmachine gunsub‧ma‧chine gun /ˌsʌbməˈʃiːn ɡʌn/ noun [countable] PMWa type of machine gun that is light and easily moved
Examples from the Corpus
submachine gun• One of them tugged the camel reins away from Kate and she found herself looking into the muzzle of a submachine gun.• A Soviet soldier with a submachine gun checked each person and his or her baggage.• Raymo was out the door, saying something into the bursts from his submachine gun.• His hand went out, reached for the submachine gun, his fingers tightening on the stock.• He wore his skullcap, his hiking boots, his pistol-and had his Uzi submachine gun strapped across his back. 