not possible; unable to be, exist, happen, etc.
unable to be done, performed, effected, etc.: an impossible assignment.
incapable of being true, as a rumor.
not to be done, endured, etc., with any degree of reason or propriety: an impossible situation.
utterly impracticable: an impossible plan.
hopelessly unsuitable, difficult, or objectionable.

Origin of impossible

First recorded in 1250–1300; Middle English word from Latin word impossibilis. See im-2, possible
Related formsim·pos·si·ble·ness, nounim·pos·si·bly, adverb
Can be confusedimpossible impracticable impractical improbable

Synonyms for impossible Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for impossibly

badly, desperately, fatally, unfortunately, incurably

Examples from the Web for impossibly

Contemporary Examples of impossibly

Historical Examples of impossibly

  • Lockwood, not impossibly, would have said it was 'to do a bit of walking' he had come.

    Lord Kilgobbin

    Charles Lever

  • Not impossibly the newspapers, though I suspect they did not employ the familiarity you speak of.

    Tony Butler

    Charles James Lever

  • There was a haunting familiarity about the impossibly beautiful features.

    The Ideal

    Stanley Grauman Weinbaum

  • The impossibly corpulent one, Don Mathers vaguely recognized.

    Medal of Honor

    Dallas McCord Reynolds

  • If, as you say, you have lived for centuries impossibly, how have you done it?

British Dictionary definitions for impossibly



incapable of being done, undertaken, or experienced
incapable of occurring or happening
absurd or inconceivable; unreasonableit's impossible to think of him as a bishop
informal intolerable; outrageousthose children are impossible
Derived Formsimpossibleness, nounimpossibly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for impossibly



late 14c., from Old French impossible, from Latin impossibilis "not possible," from assimilated form of in- "not, opposite of" (see in- (1)) + possibilis (see possible). Related: Impossibly.

Online Etymology Dictionary, © 2010 Douglas Harper