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Synonyms

unreasoning

American  
[uhn-ree-zuh-ning] / ʌnˈri zə nɪŋ /

adjective

  1. not reasoning or exercising reason; reasonless; thoughtless; irrational.

    an unreasoning fanatic.
unreasoning British  
/ ʌnˈriːzənɪŋ /

adjective

  1. not controlled by reason; irrational

"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 Word Forms

  • unreasoningly adverb

Etymology

Origin of unreasoning

First recorded in 1745–55; un- 1 + reasoning

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

While those words are engraved in historical memory, the ones that immediately follow are just as important: Roosevelt singled out the "nameless, unreasoning, unjustified terror which paralyzes needed efforts to convert retreat into advance."

From Salon • Sep. 12, 2021

This entire column is really a stretch, it's ivory tower luxury to contemplate "unreasoning obscurantism" and its connection to macrobiotic diets.

From New York Times • Feb. 24, 2018

Not everyone agrees that today’s fears are unreasoning or unjustified.

From The Wall Street Journal • Jan. 14, 2016

If it is simply a matter of introducing into the process some figure in whom the public has unreasoning trust, we might just as plausibly have the president’s targeting decisions reviewed by Oprah.

From Time • Feb. 19, 2013

But then the fatal unreasoning knowledge came to him again.

From "Lord of the Flies" by William Golding

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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