formal
1
: the relationship between something that happens or exists and the thing that causes it
Scientists found no causality between the events.
2
: the idea that something can cause another thing to happen or exist
the principle of causality
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“Causality.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/causality. Accessed 3 Jul. 2026.
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