ABSabbr.1. antilock braking system2. asset-backed securityAmerican 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.abs (æbz) pl ninformal abdominal musclesABS abbreviation for (Elements & Compounds) acrylonitrile-butadiene-styrene: any of a range of tough copolymers used esp for making moulded articles Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014abs (æbz) n.pl. Informal. abdominal muscles. [1980?85, Amer.] ABS n. a strong, lightweight plastic that is a copolymer of acrylonitrile, butadiene, and styrene. ABS antilock braking system. abs- var. of ab-, before c and t: abscond; abstract. abs. 1. absent. 2. absolute. 3. abstract. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.