'Impossibility' definitions:

Definition of 'impossibility'

(from WordNet)
noun
Incapability of existing or occurring [syn: impossibility, impossibleness] [ant: possibility, possibleness]
noun
An alternative that is not available [syn: impossibility, impossible action]

Definition of 'Impossibility'

From: GCIDE
  • 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]