not permeable; impassable.
Chemistry, Geology. (of porous substances, rocks, etc.) not permitting the passage of a fluid through the pores, interstices, etc.
Origin of impermeable
Related formsim·per·me·a·bil·i·ty, im·per·me·a·ble·ness, nounim·per·me·a·bly, adverb
From the Late Latin
dating back to 1690–1700.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for impermeabilityinflexibility
Examples from the Web for impermeability
Historical Examples of impermeability
British Dictionary definitions for impermeability
Derived Formsimpermeability or impermeableness, nounimpermeably, adverb
(of a substance) not allowing the passage of a fluid through interstices; not permeable
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for impermeability
1690s, from French imperméable, from Late Latin impermeabilis, from assimilated form of in- "not, opposite of" (see in- (1)) + permeabilis (see permeable).
Online Etymology Dictionary, © 2010 Douglas Harper
impermeability in Medicine
Related formsim•per′me•a•bil′i•ty null n.
Impossible to permeate; not permitting passage.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
impermeability in Science
Relating to a material through which substances, such as liquids or gases, cannot pass. Some substances, such as some types of contact lenses, are permeable to gas but impermeable to liquid.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.