rationality

noun

ra·​tio·​nal·​i·​ty ˌra-shə-ˈna-lə-tē How to pronounce rationality (audio)
plural rationalities
1
: the quality or state of being rational
2
: the quality or state of being agreeable to reason : reasonableness
3
: a rational opinion, belief, or practice
usually used in plural

Examples of rationality in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In Knausgaard’s novel, which is set in a realistic, modern-day Norway, rationality is suspended when an actual miracle occurs: a new star appears in the night sky. Joshua Rothman, The New Yorker, 25 Jan. 2025 Setting aside humanity, humility, charity, generosity, rationality, reality and other distractions, the Los Angeles fires add another element to what was already a fraught relationship between two egocentric political figures. Dan Walters, The Mercury News, 24 Jan. 2025 But transport yourself back to the early 20th century: at the same time that senseless World Wars were prompting Surrealists to lose faith in rationality, quantum physics came around, too, showing us yet another way in which common sense is good for little. Emily Watlington, ARTnews.com, 20 Dec. 2024 Her femininity and sexuality were contrasted with Octavian’s masculinity and rationality. Matthew Wills, JSTOR Daily, 6 Dec. 2024 See all Example Sentences for rationality 

Word History

First Known Use

1628, in the meaning defined at sense 1

Time Traveler
The first known use of rationality was in 1628

Dictionary Entries Near rationality

Cite this Entry

“Rationality.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rationality. Accessed 6 Feb. 2025.

Kids Definition

rationality

noun
ra·​tio·​nal·​i·​ty ˌrash-ə-ˈnal-ət-ē How to pronounce rationality (audio)
: the quality or state of being rational

Medical Definition

rationality

noun
ra·​tio·​nal·​i·​ty ˌrash-ə-ˈnal-ət-ē How to pronounce rationality (audio)
plural rationalities
1
: the quality or state of being rational
2
: the quality or state of being agreeable to reason
Last Updated: - Updated example sentences
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