impossible Meaning, Definition & Usage

  1. noun something that cannot be done
    • his assignment verged on the impossible
  2. adjective not capable of occurring or being accomplished or dealt with
    • an impossible dream
    • an impossible situation
  3. adjective satellite totally unlikely
    unimaginable; inconceivable; out of the question.
  4. adjective satellite used of persons or their behavior
    unsufferable; insufferable; unacceptable.
    • impossible behavior
    • insufferable insolence

WordNet

Im*pos"si*ble adjective
Etymology
F., fr. L. impossibilis; pref. im- not + possibilis possible. See Possible.
Definitions
  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.
    With men this is impossible; but with God all things are possible. Matt. xix. 26.
    Without faith it is impossible to please him. Heb. xi. 6.
    Syn. -- See Impracticable.
Im*pos"si*ble noun
Definitions
  1. An impossibility. Obs.
    "Madam," quoth he, "this were an impossible!" Chaucer.

Webster 1913