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permeable

adjective

per·​me·​able ˈpər-mē-ə-bəl How to pronounce permeable (audio)
: 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.
Tuff, which is soft and porous and formed out of volcanic ash, is topped by basalt, which is harder and less permeable. Katie Kitamura, Travel + Leisure, 17 Nov. 2025 The combination of tidal zones, resilient vegetation, and permeable surfaces supports biodiversity and forms a living landscape that adapts to the changing rhythms of the Elbe. New Atlas, 14 Nov. 2025 From alpine-ready Polartec® Power Shield™ Pro and circular-enabled Polartec® Power Shield™ RPM, to the groundbreaking new Polartec® AirCore™—the industry’s first truly air-permeable membrane—the future of weather protection is being rewritten in the Polartec innovation labs. Sj Studio, Sourcing Journal, 10 Nov. 2025 Our nervous systems are permeable. Marc Brackett, Time, 28 Oct. 2025 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 29 Nov. 2025.

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

More from Merriam-Webster on permeable

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