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impervious

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adjective im·per·vi·ous \(ˌ)im-ˈpər-vē-əs\

Simple Definition of impervious

  • : not allowing something (such as water or light) to enter or pass through

  • : not bothered or affected by something

Full Definition of impervious

  1. 1 a :  not allowing entrance or passage :  impenetrable <a coat impervious to rain> b :  not capable of being damaged or harmed <a carpet impervious to rough treatment>

  2. 2 :  not capable of being affected or disturbed <impervious to criticism>

im·per·vi·ous·ly adverb
im·per·vi·ous·ness noun

Examples of impervious

  1. … Berlin struck me, above all, as impervious to any political reactions whatever … —Stephen Spender, New York Times Magazine, 30 Oct.1977

  2. He looked at her, impervious to her tears … —Jean Stafford, Children Are Bored on Sunday, (1945) 1953

  3. … the trunk … is encased in so hard a bark, as to be almost impervious to a bullet … —Herman Melville, Omoo, 1847

  4. <the material for this coat is supposed to be impervious to rain>

  5. <the rain forest is impervious to all but the most dedicated explorers>



Origin of impervious

Latin impervius, from in- + pervius pervious


First Known Use: 1640


Medical Dictionary

impervious

play
adjective im·per·vi·ous \(ˈ)im-ˈpər-vē-əs\

Medical Definition of impervious

  1. :  not allowing entrance or passage <medication packaged in a container impervious to air and light>

  2. im·per·vi·ous·ness noun





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