cau·​sal·​i·​ty | \ kȯ-ˈza-lə-tē How to pronounce causality (audio) \
plural causalities

Definition of causality

1 : a causal quality or agency
2 : the relation between a cause and its effect or between regularly correlated events or phenomena

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Examples of causality in a Sentence

Scientists found no causality between the events. a supreme being is a being that, by definition, has no causality of its own

Recent Examples on the Web

The link between poor diet and mood disorders has been long known, but what has been less clear is the direction of causality. Max Lugavere, CNN, "How your next meal could help fight depression and stress," 20 Mar. 2018 Heavy cannabis use has been associated with schizophrenia, but the direction of the causality (if any exists) hasn't been clear. John Timmer, Ars Technica, "Researchers ID genes that could make you more likely to try cannabis," 28 Aug. 2018 Cause and harm The analysis explores how establishing harm and proving causality influence different outcomes. Cathleen O'grady, Ars Technica, "What happens when climate change meets the courts?," 26 Aug. 2018 Journalists look for direct causality, while historians see complexity. Joel Achenbach, Washington Post, "Did the news media, led by Walter Cronkite, lose the war in Vietnam?," 25 May 2018 While there is no causality, there is a connection in the attitudes of this unhinged gunmen and the president of the United States, a dangerous failure to understand the role of the media in our society. Fox News, "John Bolton previews the Trump-Putin summit; Leonard Leo on frontrunners to replace Justice Kennedy," 1 July 2018 This new prospective study, in the Journal of Psychiatric Research, is a step closer to establishing causality. Nicholas Bakalar, New York Times, "Night Owls May Have Higher Depression Risk," 20 June 2018 Target has yet to budge on Grady's insurance claim and hasn't yet released any more information about additional parking lot causalities. Sarah Schreiber, Good Housekeeping, "Watch a Rogue 2-Ton Target Ball Unleash Utter Chaos in a Parking Lot," 6 Feb. 2017 Staff from the coroner’s office went around and photographed the dummies laying around the helicopter that portrayed the causalities from the accident. Becky Jacobs, Post-Tribune, "More than 100 people, a dozen agencies participate in mock crash at Gary airport," 22 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'causality.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of causality

1603, in the meaning defined at sense 1

History and Etymology for causality

borrowed from Medieval Latin causālitāt- causālitās, from Late Latin causālis causal + Latin -itāt-, -itās -ity

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Statistics for causality

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Time Traveler for causality

The first known use of causality was in 1603

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More Definitions for causality



English Language Learners Definition of causality

: the relationship between something that happens or exists and the thing that causes it
: the idea that something can cause another thing to happen or exist


cau·​sal·​i·​ty | \ kȯ-ˈza-lə-tē How to pronounce causality (audio) \
plural causalities

Legal Definition of causality

: the relationship between cause and effect

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Comments on causality

What made you want to look up causality? Please tell us where you read or heard it (including the quote, if possible).


to speak slightingly about or to degrade

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