impossibility

from WordNet (r) 3.0 (2006)
impossibility
    n 1: incapability of existing or occurring [syn:
         {impossibility}, {impossibleness}] [ant: {possibility},
         {possibleness}]
    2: an alternative that is not available [syn: {impossibility},
       {impossible action}]
    
from The Collaborative International Dictionary of English v.0.48
Impossibility \Im*pos`si*bil"i*ty\, n.; pl. {Impossibilities}.
   [L. impossibilitas: cf. F. impossibilit['e].]
   1. The quality of being impossible; impracticability.
      [1913 Webster]

            They confound difficulty with impossibility.
                                                  --South.
      [1913 Webster]

   2. An impossible thing; that which is not possible; that
      which can not be thought, done, or endured.
      [1913 Webster]

            Impossibilities! O, no, there's none. --Cowley.
      [1913 Webster]

   3. Inability; helplessness. [R.] --Latimer.
      [1913 Webster]

   {Logical impossibility}, a condition or statement involving
      contradiction or absurdity; as, that a thing can be and
      not be at the same time. See {Principle of Contradiction},
      under {Contradiction}.
      [1913 Webster]
    
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
IMPOSSIBILITY. The character of that which. cannot be done agreeably to the 
accustomed order of nature. 
     2. It is a maxim that no one is bound to perform an impossibility. A 
l'impossible nul n'est tenu. 1 Swift's Dig. 93; 6 Toull. n. 121, 481. 
     3. As to impossible conditions in contracts, see Bac. Ab. Conditions, 
M; Co. Litt. 206; Roll. Ab. 420; 6 Toull. n. 486, 686; Dig. 2, 14, 39; Id. 
44, 7, 31; Id. 50, 17, 185; Id. 45, 1, 69. On the subject of impossible 
conditions in wills, vide 1 Rop. Leg. 505; Swinb. pt. 4, s. 6; 6 Toull. 614. 
Vide, generally, Dane's Ab. Index, h.t.; Clef des Lois Rom. par Fieffe 
Lacroix, h.t.; Com. Dig. Conditions, D 1 & 2; Vin. Ab. Conditions, C a, D 
a, E a. 
    

[email protected]