Dictionary![]() ![]() im•pos•si•blePronunciation: (im-pos'u-bul), [key] —adj. 1. not possible; unable to be, exist, happen, etc. 2. unable to be done, performed, effected, etc.: an impossible assignment. 3. incapable of being true, as a rumor. 4. not to be done, endured, etc., with any degree of reason or propriety: an impossible situation. 5. utterly impracticable: an impossible plan. 6. hopelessly unsuitable, difficult, or objectionable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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