definition of
diffusion

[1] #1 diffusion n. (physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration. wn

[2] #2 diffusion n. the spread of social institutions (and myths and skills) from one society to another. wn

[3] #3 diffusion n. [dissemination] the property of being diffused or dispersed. wn

[4] #4 diffusion n. [dispersion, dispersal, dissemination] the act of dispersing or diffusing something; "the dispersion of the troops"; "the diffusion of knowledge". wn