Noun impossibility has 2 senses
  1. impossibility, impossibleness - incapability of existing or occurring
    --1 is a kind of nonexistence, nonentity
    Antonyms: possibility, possibleness
    --1 has particulars: inconceivability, inconceivableness; unattainableness
  2. impossibility, impossible action - an alternative that is not available
    --2 is a kind of option, alternative, choice
    --2 has particulars: impossible
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