1. permeation (+ adv./prep.) the process of a liquid, gas, etc. spreading to every part of an object or a place
   • ● The product's solvent, ethanol, may enhance its permeation through the skin.

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2. the fact of affecting every part of something
   • ● the growing permeation of online social networks in our everyday life

[TahlilGaran] English Dictionary ▲