cau·sal·i·ty (kô-z?l??-t?)n. pl. cau·sal·i·ties 1. The principle of or relationship between cause and effect.2. A causal agency, force, or quality.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.causality (k???zæl?t?) n, pl -ties1. a. the relationship of cause and effectb. the principle that nothing can happen without being caused2. causal agency or qualityCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014cau?sal?i?ty (k??zæl ? ti) n., pl. -ties. 1. the relation of cause and effect. 2. causal quality or agency. [1595?1605] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.