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improbable

[im-prob-uh-buhl]
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adjective
  1. not probable; unlikely to be true or to happen: Rain is improbable tonight.
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Origin of improbable

From the Latin word improbābilis, dating back to 1590–1600. See im-2, probable
Related formsim·prob·a·bly, adverbim·prob·a·ble·ness, nounsu·per·im·prob·a·ble, adjectivesu·per·im·prob·a·ble·ness, nounsu·per·im·prob·a·bly, adverb
Can be confusedimpossible impracticable impractical improbable

Synonyms

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

remarkablyextraordinarilyimprobablyastonishingly

Examples from the Web for improbably

Contemporary Examples

Historical Examples

  • Not improbably, the public may yet be gratified with this collection.

    Other Tales and Sketches

    Nathaniel Hawthorne

  • Still, Eirek's Paradise may not improbably have been Ceylon.

    Storyology

    Benjamin Taylor

  • Trafford, not improbably, ruling some rajah's kingdom in the far East.

  • It will be my duty to write to him in a few days, and not improbably with the same result.

    Luttrell Of Arran

    Charles James Lever

  • There would have been a scene, of course; and she, not improbably, might have told her father.

    Is He Popenjoy?

    Anthony Trollope


British Dictionary definitions for improbably

improbable

adjective
  1. not likely or probable; doubtful; unlikely
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Derived Formsimprobability or improbableness, nounimprobably, 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 improbably

improbable

adj.

1590s, from assimilated form of in- (1) "not, opposite of" + probable, or else from Latin improbabilis. Related: Improbably.

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Online Etymology Dictionary, © 2010 Douglas Harper