permeable

adjective

per·​me·​able ˈpər-mē-ə-bəl How to pronounce permeable (audio)
Synonyms of permeablenext
: capable of being permeated : penetrable
especially : having pores or openings that permit liquids or gases to pass through
a permeable membrane
permeable limestone

Did you know?

“Our landscapes are changing … they’re becoming less permeable to wildlife at the precise moment animals need to move most,” writes Ben Goldfarb in his book Crossings: How Road Ecology is Shaping the Future of Our Planet. He’s describing the effects of highway infrastructure and at the same time clearly demonstrating the meaning of permeable, a word that traces back to a combination of the prefix per-, meaning “through,” and the Latin verb meare, meaning “to go” or “to pass.” Accordingly, a permeable landscape—such as one where humans have constructed wildlife overpasses—is one that allows animals to pass and spread through unimpeded. Permeable’s relative, the verb permeate (“to spread or diffuse through”) is another commonly used meare descendent, but other relations haven’t managed to permeate the language quite so widely, such as meatus (“a natural body passage”), congé (“a formal permission to depart”), and irremeable (“offering no possibility of return”).

Examples of permeable in a Sentence

The cell has a permeable membrane. a permeable fabric that allows your body heat to escape will be much more comfortable in the summertime
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Seawater is forced at high pressure through a semi-permeable membrane that allows water molecules to pass through while blocking most salts and other impurities. ABC News, 1 Apr. 2026 Future heat shields will feature design changes to fix the issue —specifically, a more permeable layer of outer material — NASA officials said. Denise Chow, NBC news, 26 Mar. 2026 Guthery plans to install a 600-square-foot permeable patio. Ricardo Torres, jsonline.com, 25 Mar. 2026 It’s all intertwined – the legal market has a symbiotic relationship with the black market, and there’s a permeable line between the two. Stuart Miller, Oc Register, 18 Mar. 2026 See All Example Sentences for permeable

Word History

First Known Use

1773, in the meaning defined above

Time Traveler
The first known use of permeable was in 1773

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Cite this Entry

“Permeable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/permeable. Accessed 3 Apr. 2026.

Kids Definition

permeable

adjective
per·​me·​able ˈpər-mē-ə-bəl How to pronounce permeable (audio)
: having pores or openings that permit liquids or gases to pass through
a permeable membrane
permeable limestone

Medical Definition

permeable

adjective
per·​me·​able ˈpər-mē-ə-bəl How to pronounce permeable (audio)
: capable of being permeated
especially : having pores or openings that permit liquids or gases to pass through
a permeable membrane

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