Property of a material that lets fluids (such as water or water vapor) to diffuse through it to another medium without being chemically or physically affected. Opposite of permeance.

Use permeability in a sentence

  • Scientist performed an experiment to find the concentration of lead which could affect the permeability of the brains' cell membranes.

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  • Paper towels should have a low level of permeability, because they have to absorb their mess and hold onto it.

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  • In order to classify the product as waterproof, we have to prove that it has very low permeability especially at shallow depths.

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