l 1 or L (?l)n. pl. l’s or L’s also ls or Ls 1. The 12th letter of the modern English alphabet.2. Any of the speech sounds represented by the letter l.3. The 12th in a series.4. Something shaped like the letter L.l 2abbr. lengthL 1 also l The symbol for the Roman numeral 50.L 2abbr.1. lambert2. large3. left4. or l liter5. Sports loss6. lowAmerican 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.ls abbreviation for (Law) (on a document) the place of the seal [from Latin locus sigilli]ls the internet domain name for (Computer Science) Lesotho LS abbreviation for (Automotive Engineering) Lesotho (international car registration) Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014LS 1. left side. 2. letter signed. 3. lightship. L.S. place of the seal (as on a document). [