1. The gradual spread or diffusion of ideas, influences, or qualities throughout something
   "The permeation of different cultures led to a rich, diverse society";
   - interpenetration
    
2. The process of permeating or infusing something with a substance
   "The permeation of the wood with preservatives increased its durability";
   - pervasion, suffusion

Derived forms: permeations

Type of: diffusion, penetration

Encyclopedia: Permeation