unheard-of

[ uhn-hurd-uhv, -ov, -uhv ]
See synonyms for unheard-of on Thesaurus.com
adjective
  1. that was never heard of; unknown: an unheard-of artist.

  2. such as was never known before; unprecedented: an unheard-of salary.

  1. shocking or outrageous: unheard-of conduct.

Origin of unheard-of

1
First recorded in 1585–95

Words Nearby unheard-of

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use unheard-of in a sentence

  • This unheard-of despotism, this horrible political perjury, was certainly not merited by the good and generous Brazil.

  • Miriam vows to devour an unheard-of number of biscuits, too.

    A Confederate Girl's Diary | Sarah Margan Dawson
  • Here have I been striving with unheard-of patience to teach you and you have not hitherto been able to say your letters even.

    Heidi | Johanna Spyri
  • This last action of unheard-of boldness literally staggered the mutineers.

    The Guide of the Desert | Gustave Aimard
  • In the act of sinking, a most extraordinary and unheard-of thing happened.

British Dictionary definitions for unheard-of

unheard-of

adjective
  1. previously unknown: an unheard-of actress

  2. without precedent: an unheard-of treatment

  1. highly offensive: unheard-of behaviour

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

Other Idioms and Phrases with unheard-of

unheard-of

Very unusual, extraordinary, as in It's unheard of to have all one's money refunded two years after the purchase. This expression alludes to a circumstance so unusual that it has never been heard of. [Late 1500s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.