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.
The developer should go back to the drawing board and come up with a way to create a larger buffer of trees and permeable surfaces between the park and their development. The Denver Post Editorial Board, The Denver Post, 17 Feb. 2025 Standard filters like reverse osmosis — which runs water through a semi-permeable membrane — typically remove a large portion of microplastics and PFAS. Benji Jones, Vox, 10 Mar. 2025 Its patented process creates a semi-permeable protective barrier to slow the moisture movement outward, minimizing warpage, and protecting it from mold, rot and decay. Jennifer Castenson, Forbes, 4 Mar. 2025 That timing isn’t just a matter of convenience—in fact, studies show that the skin barrier is more permeable in the evening hours, which may allow these ingredients to more easily absorb into skin. Deanna Pai, Vogue, 4 Mar. 2025 See All Example Sentences for permeable

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of permeable was in the 15th century

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Cite this Entry

“Permeable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/permeable. Accessed 23 Apr. 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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