a. | 1. | Not possible; incapable of being done, of existing, etc.; unattainable in the nature of things, or by means at command; insuperably difficult under the circumstances; absurd or impracticable; not feasible.
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n. | 1. | An impossibility; |
Noun | 1. | impossible - something that cannot be done; "his assignment verged on the impossible" |
Adj. | 1. | impossible - not capable of occurring or being accomplished or dealt with; "an impossible dream"; "an impossible situation" Antonyms: possible - capable of happening or existing; "a breakthrough may be possible next year"; "anything is possible"; "warned of possible consequences" |
2. | impossible - totally unlikely | |
3. | impossible - used of persons or their behavior; "impossible behavior"; "insufferable insolence" |