Impenetrability

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Impenetrability \Im*pen`e*tra*bil"i*ty\, n. [Cf. F.
     imp['e]n['e]trabilit['e].]
     1. Quality of being impenetrable.
        [1913 Webster]
  
     2. (Physics) That property in virtue of which two portions of


        matter can not at the same time occupy the same portion of
        space.
        [1913 Webster]
  
     3. Insusceptibility of intellectual or emotional impression;
        obtuseness; stupidity; coldness.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  impenetrability
       n 1: resistance to penetration by a liquid [syn: {imperviousness}]
            [ant: {penetrability}, {penetrability}]
       2: incomprehensibility by virtue of being too dense to
          understand [syn: {impenetrableness}]