impermeable
adjective
im·per·me·able
(ˌ)im-ˈpər-mē-ə-bəl 
: not permitting passage (as of a fluid) through its substance
broadly
: impervious
Examples of impermeable in a Sentence
an impermeable layer of rock
a fabric impermeable to moisture
Recent Examples on the Web
Achieving that often meant forgoing impermeable materials and permanent designs, which stands in stark contrast to the way modern-day water management works are constructed.
—
Ari Caramanica, The Conversation, 8 Apr. 2025
Taxing cruise ships with foreign flags seems like a simple concept, like building an impermeable border wall.
—Roger Dooley, Forbes, 22 Feb. 2025
The impermeable bottom layer is deep in some areas – close to 600 feet – and shallow in others – like 50 feet.
—Daniel Desrochers, Kansas City Star, 16 Jan. 2025
As Hurricane Milton is expected to bring record-breaking storm surge yet again to the region, the hospital -- located on the bay near downtown Tampa -- is surrounded by the water-impermeable barrier once more.
—Meredith Deliso, ABC News, 9 Oct. 2024
See All Example Sentences for impermeable
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.
Ari Caramanica, The Conversation, 8 Apr. 2025
Taxing cruise ships with foreign flags seems like a simple concept, like building an impermeable border wall.
—Roger Dooley, Forbes, 22 Feb. 2025
The impermeable bottom layer is deep in some areas – close to 600 feet – and shallow in others – like 50 feet.
—Daniel Desrochers, Kansas City Star, 16 Jan. 2025
As Hurricane Milton is expected to bring record-breaking storm surge yet again to the region, the hospital -- located on the bay near downtown Tampa -- is surrounded by the water-impermeable barrier once more.
—Meredith Deliso, ABC News, 9 Oct. 2024
See All Example Sentences for impermeable
Cite this Entry
“Impermeable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impermeable. Accessed 22 Apr. 2025.
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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share