mathematical logicn. See symbolic logic.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.mathematical logic n 1. (Logic) symbolic logic, esp that branch concerned with the foundations of mathematics 2. (Mathematics) symbolic logic, esp that branch concerned with the foundations of mathematics Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014symbol?ic log?ic n. a modern development of formal logic employing a special notation or symbolism capable of manipulation in accordance with precise rules. Also called mathematical logic. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.