Definition of "impervious" in English

adjective

1. Unaffected or unable to be affected by something.

   • The man was completely impervious to the deception we were trying.

2. Preventive of any penetration; impenetrable, impermeable, particularly of water.

   • Although patchworked and sagging, the roof proved impervious to the weather.

3. Immune to damage or effect.

   • The old car seemed to be impervious to the wear and tear of age.