Meaning of DIFFUSION in English

n. 1 the act or an instance of diffusing; the process of being diffused. 2 Physics & Chem. the interpenetration of substances by the natural movement of their particles. 3 Anthropol. the spread of elements of culture etc. to another region or people. diffusionist n.

[ ME f. L diffusio (as DIFFUSE) ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.