NLabbr.1. Baseball National League2. Newfoundland & Labrador3. New Latin4. Latin non licet (not permitted)5. Latin non liquet (not clear)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.nl abbreviation for 1. (Law) non licet 2. (Law) non liquet [Latin: (for sense 1) it is not permitted (for sense 2) it is not clear]nl the internet domain name for (Computer Science) the Netherlands NL abbreviation for 1. (Languages) New Latin 2. (Automotive Engineering) the Netherlands (international car registration) Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014NL 1. New Latin. 2. night letter. N.L. National League. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.