1. The quality of being impervious; inability to be penetrated or affected by something physical
The imperviousness of the material to water makes it ideal for outdoor use.
A impermeabilidade do material à água o torna ideal para uso ao ar livre.
2. The quality of being unaffected by or insensitive to something abstract, such as criticism or emotion
His imperviousness to criticism prevented him from improving his work.
Sua impermeabilidade à crítica o impediu de melhorar seu trabalho.
3. The state of being impenetrable or resistant to passage or influence
The rock's imperviousness made it difficult to drill through.
A impermeabilidade da rocha dificultou a perfuração.