occasional cause

noun

1

a

: 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

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now