noun, plural cau·sal·i·ties.

the relation of cause and effect: The result is the same, however differently the causality is interpreted.
causal quality or agency.

Origin of causality

First recorded in 1595–1605; causal + -ity
Related formsnon·cau·sal·i·ty, noun
Can be confusedcasualty causalitycausality causation cause Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for causality


noun plural -ties

  1. the relationship of cause and effect
  2. the principle that nothing can happen without being caused
causal agency or quality
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for causality

c.1600, from causal + -ity.

Online Etymology Dictionary, © 2010 Douglas Harper