from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Impossible to imagine; inconceivable.
  • adjective Not worth considering because of being socially unacceptable, too difficult, or too risky.
  • adjective Abhorrent; monstrous.

from The Century Dictionary.

  • That cannot be made an object of thought; that cannot be thought; incogitable.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Incapable of being believed; incredible.
  • adjective Inconceivable or unimaginable; extremely improbable in a way that goes against common sense.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective incapable of being conceived or considered


from Wiktionary, Creative Commons Attribution/Share-Alike License

un- +‎ thinkable


Help support Wordnik (and make this page ad-free) by adopting the word unthinkable.



Log in or sign up to get involved in the conversation. It's quick and easy.