Main Entry: dif·fu·sion

Pronunciation: \di-ˈfyü-zhən\

Function: noun

Date: 14th century

1 : the action of diffusing : the state of being diffused
2 : prolixity, diffuseness
3 a : the process whereby particles of liquids, gases, or solids intermingle as the result of their spontaneous movement caused by thermal agitation and in dissolved substances move from a region of higher to one of lower concentration b (1) : reflection of light by a rough reflecting surface (2) : transmission of light through a translucent material : scattering
4 : the spread of cultural elements from one area or group of people to others by contact
5 : the softening of sharp outlines in a photographic image

— dif·fu·sion·al \-ˈfyü-zhə-n^əl\ adjective