Try Our Apps


90s Slang You Should Know


[uhn-ree-zuh n] /ʌnˈri zən/
inability or unwillingness to think or act rationally, reasonably, or sensibly; irrationality.
lack of reason or sanity; madness; confusion; disorder; chaos:
a world torn by unreason.
verb (used with object)
to upset or disrupt the reason or sanity of:
The devious plot soon unreasoned the general.
Origin of unreason
First recorded in 1250-1300, unreason is from the Middle English word un-reson. See un-1, reason Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for unreason
Contemporary Examples
Historical Examples
  • The more he believes in his own reason, the more he yearns for some method of out-shouting the unreason of his neighbours.

    God and Mr. Wells William Archer
  • The unreserve and unreason of her passion at last disgusted him.

    A Spoil of Office Hamlin Garland
  • The greatest theologians contributed to the welter of unreason from which this pseudo-science was developed.

  • It was typical of the unreason of his sex that he failed to be impressed by this argument.

    A Modern Chronicle, Complete Winston Churchill
  • I gave up reason; I surrendered myself to unreason; it is a not unpleasant process, occasionally.

    When the World Shook H. Rider Haggard
  • It was almost hysteria, to such a pitch of unreason was she wrought.

    Demos George Gissing
  • There were not only doubt and denial, but now there were also impatience and unreason.

    Soul of a Bishop H. G. Wells
British Dictionary definitions for unreason


irrationality or madness
something that lacks or is contrary to reason
lack of order; chaos
(transitive) to deprive of reason
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
Cite This Source

Word of the Day

Difficulty index for unreason

Some English speakers likely know this word

Word Value for unreason

Scrabble Words With Friends

Nearby words for unreason