cau·​sal·​i·​ty kȯ-ˈza-lə-tē How to pronounce causality (audio)
plural causalities
: a causal quality or agency
: the relation between a cause and its effect or between regularly correlated events or phenomena

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 Israel-Gaza war Israel-Gaza war: More causalities were reported after strikes on the central Gaza Strip and the southern city of Rafah on the border with Egypt. Louisa Loveluck, Washington Post, 12 Feb. 2024 The group has held on despite a dire humanitarian crisis and hundreds of thousands of civilian causalities. Mohammad Ayatollahi Tabaar, Foreign Affairs, 29 Jan. 2024 Searching for backward causality required looking at the impact of the final measurement and adding the time twist. Zeeya Merali, Discover Magazine, 18 Apr. 2023 The meeting also included Netanyahu's war cabinet, where the official said Sullivan was briefed on Israeli efforts to minimize civilian causalities in Gaza. Hala Gorani, NBC News, 15 Dec. 2023 European leaders have expressed concern for civilian causalities. Beatriz Ríos, Washington Post, 26 Oct. 2023 Sometimes, but often not in the way they were intended, and rarely in ways that confirm obvious causality. Jim Small, Fortune, 9 Oct. 2023 The researchers relied on observational data to establish a correlation between cannabis use and heart failure, but the causality cannot be determined. Stephanie Brown, Verywell Health, 15 Nov. 2023 Among them was a 2019 presentation by user experience researchers finding that, while causality was hard to establish, Instagram’s aesthetic of casual perfection could trigger negative thinking among some users. Jeff Horwitz, Rolling Stone, 11 Nov. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'causality.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

First Known Use

1603, in the meaning defined at sense 1

Time Traveler
The first known use of causality was in 1603

Dictionary Entries Near causality

Cite this Entry

“Causality.” Dictionary, Merriam-Webster, Accessed 22 Feb. 2024.

Legal Definition


cau·​sal·​i·​ty kȯ-ˈza-lə-tē How to pronounce causality (audio)
plural causalities
: the relationship between cause and effect

More from Merriam-Webster on causality

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!