DIFFUSION, n. S as z. 1. A spreading or flowing of a liquid substance or fluid, in a lateral as well as a lineal direction; as the diffusion of water; the diffusion of air or light.2. A spreading or scattering; dispersion; as a diffusion of dust or of seeds.3. A spreading; extension; propagation; as the diffusion of knowledge, or of good principles.4. Copiousness; exuberance, as of style. [Little used.]
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