Meaning of diffusion

Definition of diffusion

(noun) (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
the spread of social institutions (and myths and skills) from one society to another
the act of dispersing or diffusing something; "the dispersion of the troops"; "the diffusion of knowledge"

Other information on diffusion

WIKIPEDIA results for diffusion
Amazon results for diffusion