'impossibleness' definitions:

Definition of 'impossibleness'

From: WordNet
noun
Incapability of existing or occurring [syn: impossibility, impossibleness] [ant: possibility, possibleness]

Definition of 'impossibleness'

From: GCIDE
  • impossibleness \impossibleness\ n. incapability of existing or occurring; impossibility.
  • Syn: impossibility. [WordNet 1.5]