impermeable
AdjectiveOpen English WordNet
Adjective (1)
- preventing especially liquids to pass or diffuse through“impermeable stone”“an impermeable layer of scum”“a coat impermeable to rain”Opposite permeableSimilar water-repellent, retentiveSee also tight, impervious
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Webster's Dictionary (1913)
Im·per′me·a·ble adjective
Origin: Pref. im- not + permeable: cf. F. imperméable, L. impermeabilis.
Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air. — Im·per′wb-a1′>′me·a·ble·ness, noun — Im·per′wb-a1′>′me·a·bly, adverb
Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54