Synonyms: impossibility, impossible action
Definition: an alternative that is not available
Similar words: option, alternative, choice
Definition: one of a number of things from which only one can be chosen
Usage: what option did I have?; there no other alternative; my only choice is to refuse
Synonyms: impossibility, impossibleness
Definition: incapability of existing or occurring
Similar words: nonentity, nonexistence
Definition: the state of not existing