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 of impermeable
Examples of impermeable in a Sentence
an impermeable layer of rock
a fabric impermeable to moisture
Recent Examples on the Web
Chocolate brown stripes punctuate a light charcoal gray background, and the low-pile weave made from recycled polyester gives it an impermeable, easy-to-clean surface.
—
Julia Harrison,
Architectural Digest,
26 June 2026
Needing to remain impermeable to everything that is said about him is another stylistic exercise built into the equation of being a global star.
—
Time,
Time,
26 June 2026
Engineers eventually replaced them with a version made up of 20 impermeable compartments of high-pressure hoses containing water.
—
Mack Degeurin,
Popular Science,
18 June 2026
Dry waterproofing technology, which is basically like an invisible, impermeable sock liner.
—
Olivia Young,
Travel + Leisure,
29 May 2026
See All Example Sentences for impermeable
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Julia Harrison,
Architectural Digest,
26 June 2026
Needing to remain impermeable to everything that is said about him is another stylistic exercise built into the equation of being a global star.
—
Time,
Time,
26 June 2026
Engineers eventually replaced them with a version made up of 20 impermeable compartments of high-pressure hoses containing water.
—
Mack Degeurin,
Popular Science,
18 June 2026
Dry waterproofing technology, which is basically like an invisible, impermeable sock liner.
—
Olivia Young,
Travel + Leisure,
29 May 2026
See All Example Sentences for impermeable
Cite this Entry
“Impermeable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impermeable. Accessed 6 Jul. 2026.
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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