impossibility
1. [ noun ] incapability of existing or occurring
Synonyms: impossibleness
Related terms: possibility nonexistence unattainableness inconceivability
2. [ noun ] (psychology) an alternative that is not available
Synonyms: impossible_action
Related terms: option impossible
Similar spelling:   impossibly
  impossible
  imposition
  imposingly
  invisibility
  impassivity
  impassable
  impossibleness
  infeasibility