the state or quality of being impenetrable.

What is the meaning of impenetrability?

1 : the quality or state of being impenetrable. 2 : the inability of two portions of matter to occupy the same space at the same time.

What is impenetrability and how is it relevant?

impenetrability in American English

(ɪmˌpenɪtrəˈbɪlɪti, ˌɪmpen-) noun. the state or quality of being impenetrable. Physics. that property of matter by virtue of which two bodies cannot occupy the same space simultaneously.