un·rea·son·ing | \ ˌən-ˈrēz-niŋ , -ˈrē-zᵊn-iŋ \

Definition of unreasoning 

: not reasoning especially : not moderated or controlled by reason unreasoning fear

Keep scrolling for more

Other words from unreasoning

unreasoningly \ˌən-ˈrēz-niŋ-lē, -ˈrē-zᵊn-iŋ- \ adverb

Examples of unreasoning in a Sentence

an unreasoning hatred of the government his unreasoning devotion to a cause

Recent Examples on the Web

Let sound political prescience but take the place of an unreasoning prejudice, and this will be done. Frederick Douglass, The Atlantic, "‘A Treacherous President Stood in the Way’," 16 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unreasoning.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of unreasoning

1677, in the meaning defined above

Keep scrolling for more

Learn More about unreasoning

Share unreasoning

Statistics for unreasoning

Look-up Popularity

Time Traveler for unreasoning

The first known use of unreasoning was in 1677

See more words from the same year

Keep scrolling for more

More Definitions for unreasoning



English Language Learners Definition of unreasoning

: not based on or controlled by reason

More from Merriam-Webster on unreasoning

Thesaurus: All synonyms and antonyms for unreasoning

Comments on unreasoning

What made you want to look up unreasoning? Please tell us where you read or heard it (including the quote, if possible).


the setting in which something occurs

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!