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[in-kuh n-see-vuh-buh l] /ˌɪn kənˈsi və bəl/
not conceivable; unimaginable; unthinkable.
unbelievable; incredible.
Origin of inconceivable
1625-35; in-3 + conceivable
Related forms
inconceivability, inconceivableness, noun
inconceivably, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for inconceivable
  • What's almost inconceivable is that the zucchini let them down.
  • It's almost inconceivable that they have statistical significance.
  • Even a few years ago such scenes would have been inconceivable.
  • It's not inconceivable that there are forms of life that thrive under those conditions.
  • In fact, it is not inconceivable that automobiles would be fueled directly with hydrogen at pumping stations.
  • The concept was-and still is-absolutely inconceivable.
  • It's not inconceivable that a state of permanent toxicity has come to seem natural.
  • In any sport or recreation it is almost inconceivable that the chief organizer of a major tournament would compete, let alone win.
  • The miracle is inconceivable without the ship-borne container.
  • Before long you'll be creating nasty stunts that you once thought were inconceivable.
British Dictionary definitions for inconceivable


incapable of being conceived, imagined, or considered
Derived Forms
inconceivability, inconceivableness, noun
inconceivably, 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
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Word Origin and History for inconceivable

1630s, from in- (1) "not, opposite of" + conceivable. Related: Inconcievably. An Old English word for this was unasmeagendlic.

Online Etymology Dictionary, © 2010 Douglas Harper
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