Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of permeation is as below...

Permeation :: Permeation (n.) The act of permeating, passing through, or spreading throughout, the pores or interstices of any substance..

Waterproof :: Waterproof (a.) Proof against penetration or permeation by water; impervious to water; as, a waterproof garment; a waterproof roof..

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