Adjacent Words

Impenetrability definitions

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Webster's 1828 Dictionary

IMPENETRABIL'ITY, n. [from impenetrable.]
1. The quality of being impenetrable.
2. In philosophy, that quality of matter which prevents two bodies from occupying the same space at the same time.
3. Insusceptibility of intellectual impression.

WordNet (r) 3.0 (2005)

n
1: the quality of being impenetrable (by people or light or missiles etc.) [syn: impenetrability, imperviousness] [ant: penetrability, perviousness]
2: incomprehensibility by virtue of being too dense to understand [syn: impenetrability, impenetrableness]

Merriam Webster's

noun Date: 1653 1. the inability of two portions of matter to occupy the same space at the same time 2. the quality or state of being impenetrable

Webster's 1913 Dictionary

Impenetrability Im*pen`e*tra*bil"i*ty, n. [Cf. F. imp['e]n['e]trabilit['e].] 1. Quality of being impenetrable. 2. (Physics) That property in virtue of which two portions of matter can not at the same time occupy the same portion of space. 3. Insusceptibility of intellectual or emotional impression; obtuseness; stupidity; coldness.