AK-47 (??k??fôr?t?-s?v??n)n. A clip-fed, gas-operated assault rifle of Soviet design having a caliber of 7.62 millimeters and used throughout the world by armed forces and paramilitary organizations.[Russian A(vtomat) K(alashnikova), automatic gun of Kalashnikov, after Viktor Timofeevich Kalashnikov (1919-2013), Soviet arms engineer.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.AK-47 n (Firearms, Gunnery, Ordnance & Artillery) a type of Kalashnikov assault rifle [C20: from A(utomat) K(alashnikov)]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014AK-47 (?e??ke??f?r ti?s?v ?n) n., pl. AK-47’s. a kalashnikov assault rifle first made in 1947. [1965?70;