impermeable
adjective
im·per·me·able
(ˌ)im-ˈpər-mē-ə-bəl 
: not permitting passage (as of a fluid) through its substance
broadly
: impervious
Synonyms
Examples of impermeable in a Sentence
an impermeable layer of rock
a fabric impermeable to moisture
Recent Examples on the Web
Clay deposits, forming an impermeable layer, result in waterlogged soil.
—
David Bressan, Forbes, 31 Oct. 2024
There is a retention pond to capture heavy rain, minimum impermeable surfaces, and any runoff is directed to trees and plants.
—Jennifer Castenson, Forbes, 22 Oct. 2024
The Chinese-Russian relationship is not impermeable, and the United States should not shy away from proactive measures to exploit its fissures.
—Andrea Kendall-Taylor, Foreign Affairs, 3 May 2021
It was given a raffia twist at both Longchamp and Sandro — there in a black-and-white striped version — as well as the impermeable and big-brimmed update at Aigle.
—Rhonda Richford, WWD, 4 Oct. 2024
See all Example Sentences for impermeable 
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David Bressan, Forbes, 31 Oct. 2024
There is a retention pond to capture heavy rain, minimum impermeable surfaces, and any runoff is directed to trees and plants.
—Jennifer Castenson, Forbes, 22 Oct. 2024
The Chinese-Russian relationship is not impermeable, and the United States should not shy away from proactive measures to exploit its fissures.
—Andrea Kendall-Taylor, Foreign Affairs, 3 May 2021
It was given a raffia twist at both Longchamp and Sandro — there in a black-and-white striped version — as well as the impermeable and big-brimmed update at Aigle.
—Rhonda Richford, WWD, 4 Oct. 2024
See all Example Sentences for impermeable
Dictionary Entries Near impermeable
Cite this Entry
“Impermeable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impermeable. Accessed 25 Nov. 2024.
Copy CitationKids Definition
impermeable
adjective
im·per·me·able
(ˈ)im-ˈpər-mē-ə-bəl
: not permitting passage (as of a fluid) through the material of which it is made
Medical Definition
impermeable
adjective
im·per·me·able
(ˈ)im-ˈpər-mē-ə-bəl
: not permitting passage (as of a fluid) through its substance
the plasma membrane of a red blood cell is relatively impermeable to sodium and calcium ions
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