Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Not to be believed; incredible: unbelievable luck.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not to be believed.
  • adj. Incredible; so surprising it is almost unable to believe.
  • adj. Implausible or improbable.

from The Century Dictionary and Cyclopedia

  • Not to be believed; incredible.

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

  • adj. having a probability too low to inspire belief
  • adj. beyond belief or understanding

Etymologies

From un- + believe + -able. (Wiktionary)

Examples

Wordnik is becoming a not-for-profit! Read our announcement here.

Comments

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

  • ouch, that was loud.

    March 12, 2011

  • DAUWN, DAUWN, DAUWN DANAUWN DANAUWM DAANAANAOUWM, DAUWN DANAAANANAUWN DAUWN etc

    March 12, 2011

  • Contronym: both a term of contempt and admiration.

    October 9, 2008