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. 2012