LWabbr.1. Sports a. left wingb. left winger2. low waterAmerican 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 All rights reserved.Lw the chemical symbol for (Chemistry) lawrencium (now superseded by Lr) LW abbreviation for 1. (Broadcasting) radio long wave 2. (Physical Geography) low water Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014