In geography, what is diffusion?

Do you know the geography term diffusion? Its types are also illustrated: spatial, contagious, hierarchal, stimulus and relocation. read more

Diffusion, in the scope of geography, is the spread of people, things, ideas, cultural practices, disease, technology, weather, and more from place to place; thus, it's called spatial diffusion. Several types of it exist: expansion (contagious and hierarchal), stimulus, and relocation diffusion. read more

Hierarchical diffusion. Occurs when the diffusion innovation or concept spreads from a place or person of power or high susceptibility to another in a leveled pattern. Stimulus diffusion. Occurs when the innovative idea diffuses from its hearth outward, but the original idea is changed by the new adopters. read more