[im-pen-i-truh-bil-i-tee, im-pen-]


the state or quality of being impenetrable.
Physics. that property of matter by virtue of which two bodies cannot occupy the same space simultaneously.

Origin of impenetrability

First recorded in 1655–65; impenetr(able) + -ability Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for impenetrability

Historical Examples of impenetrability

  • Hill sat looking at Hiram, who, with all his impenetrability wore a surprised and puzzled expression.

  • A great physicist tells us that, when dealing with sufficiently high speeds, matter has no such property as impenetrability.

    Carmen Ariza

    Charles Francis Stocking

  • Nothing was more remarkable than his impenetrability to ridicule and censure.

    Arthur Mervyn

    Charles Brockden Brown

  • His impenetrability had been smiling ever since the morning.

    Les Misrables

    Victor Hugo

  • He looked back with baffling, inscrutable eyes, his dark face masklike in its impenetrability.