(biology, chemistry) diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal | the act of dispersing or diffusing something |
| the property of being diffused or dispersed |
| the spread of social institutions (and myths and skills) from one society to another |
| (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 |