Diffusion - Definition
diffusion
n 1: (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
2: the spread of social institutions (and myths and skills) from
one society to another
3: the property of being diffused or dispersed [syn:
dissemination, diffusion]
4: the act of dispersing or diffusing something; "the dispersion
of the troops"; "the diffusion of knowledge" [syn:
dispersion, dispersal, dissemination, diffusion]