Definition of impervious in English:



  • 1Not allowing fluid to pass through.

    ‘an impervious layer of basaltic clay’
    • ‘In other words, it's not impervious to moisture but it will get you through an afternoon cloudburst.’
    • ‘The coatings are weldable and impervious to automotive and hydraulic fluids.’
    • ‘This impervious drape allows a 3-sq inch opening at the femoral site and covers the patient from head to toe.’
    impermeable, impenetrable, impregnable, waterproof, watertight, water-resistant, water-repellent
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  • 2Unable to be affected by.

    ‘he worked, apparently impervious to the heat’
    • ‘My heart goes out to particular moments and people, both recent and distant, and holds on for dear life, impervious to happiness or unhappiness.’
    • ‘His calculations are based on ideas that do not necessarily correspond to reality and are often impervious to outside influences.’
    • ‘Young and oddly confident, they are blind to their deficiencies and impervious to the daunting odds stacked against them.’
    • ‘Second, commerce is impervious to modern political boundaries.’
    • ‘When did we begin to allow, let alone forgive, let alone encourage work that is so rhetorical, so impervious to public engagement?’
    • ‘It seems obvious to them and impervious to more complicated arguments.’
    • ‘He was not entirely impervious to new evidence, however.’
    • ‘The prejudice is so complete it is impervious to reason.’
    • ‘True, they get pretty chilly if the fire goes out, but wrapped in a double duvet and lying on your own personal sheepskin, you'll be impervious to the cold.’
    • ‘The administration seems indifferent to data, impervious to competing viewpoints and ideas.’
    • ‘It is impervious to the growth issue and always has been.’
    • ‘It's utterly funny to observe how many people will see one person standing, and then become utterly impervious to the empty seats, and also stand.’
    • ‘Ultimately, the child loses self-esteem, leaving an impression to the outside world that he is impervious to rehabilitation.’
    • ‘Our council seem impervious to criticism and oblivious to basic common sense.’
    • ‘While the Savoy remains one of the more traditional tearooms in London, even this traditional establishment is not impervious to modernisation.’
    • ‘Yet from our plane window, we can see idyllic seaside villages seemingly impervious to the devastation that has swept the region.’
    • ‘They seem impervious to everything, even poison.’
    • ‘Male attire is impervious to fashion because it is indifferent to sexual display or allure: it need not follow shifting erogenous zones.’
    • ‘It cannot be a good sign that the filmmakers are largely impervious to the insecurity and suffering of wide layers of the population.’
    • ‘Over the last couple of years, he had become impervious to the disrespect and ignorance of his classmates.’
    unaffected by, untouched by, immune to, invulnerable to, insusceptible to, not susceptible to, proof against, unreceptive to, closed to, resistant to, indifferent to, heedless of, unresponsive to, oblivious to, unmoved by, deaf to
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Mid 17th century: from Latin impervius (from in- not + pervius pervious) + -ous.