noun Anthropology.
the theory or principle that diffusion is the main force in cultural innovation and change.

1935–40; diffusion + -ism

diffusionist, noun, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Main Entry:  diffusionist
Part of Speech:  n
Definition:  advocation of the theory of the spread of cultural elements from one area or people to another area or people rather than by independent discovery
Usage:  anthropology
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