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English definition of “permeable”

permeable

adjective uk   /ˈpɜː.mi.ə.bl̩/ us    /ˈpɝː-/ formal
If a substance is permeable, it allows liquids or gases to go through it: Certain types of sandstone are permeable to water. The solvent passes through the permeable membrane to the solution. Soft and gas-permeable contact lenses are kinder to the eyes than hard lenses.
Opposite
(Definition of permeable from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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