SLabbr.1. salvage loss2. sea level3. source languageAmerican 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.sl abbreviation for (Library Science & Bibliography) sine loco [Latin: without place (of publication)]sl the internet domain name for (Computer Science) Sierra Leone SL abbreviation for (Law) Solicitor at Law Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014s.l. 1. salvage loss. 2. without place (of publication). [