Definition of occasional cause
1a : a mental state (as desire or decision) considered as the occasion but not the real cause of a physical phenomenon (as bodily behavior)
b : a physical phenomenon considered similarly as the occasion of a mental state — compare occasionalism
2 : a circumstance that precedes an effect and that without being the real cause is the occasion of its action
Love words? Need even more definitions?Merriam-Webster unabridged
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