U·zi or U·ZI (o?o?z?)n. pl. U·zis or U·ZIs Any of various compact submachine guns having a caliber of 9 millimeters, originally designed in Israel in the 1950s.[After Uzi el-Gal, 20th-century Israeli army officer and weapons designer.]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.Uzi (?u?z?) n (Firearms, Gunnery, Ordnance & Artillery) a sub-machine gun of Israeli design[C20: after Uziel Gal, the Israeli army officer who designed it]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014U?zi (?u zi) n., pl. U?zis. a compact 9mm submachine gun of Israeli design. [1955; after Uzi(el Gal), Israeli army officer who designed it]Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.