Definition of “impermeable” - English Dictionary

british dictionary

(Definition of “impermeable” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“impermeable” in American English

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us /ɪmˈpɜr·mi·ə·bəl/

science describes a substance that does not allow liquids or gases to go through it

(Definition of “impermeable” from the Cambridge Academic Content Dictionary © Cambridge University Press)