rationality

noun
ra·​tio·​nal·​i·​ty | \ ˌra-shə-ˈna-lə-tē How to pronounce rationality (audio) \
plural rationalities

Definition of rationality

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

These depended, as did all microeconomic theory of the day, on the assumption that rationality dominates human decision making. Edward Lotterman, Twin Cities, "Real World Economics: ‘Inflation is solved’? Don’t bank on it," 28 July 2019 The righteously perverse individual appreciates the value of rationality, morality, and the good life—and then, chafing against them, chooses another path. Paul Bloom, The New Yorker, "The Strange Appeal of Perverse Actions," 19 July 2019 This makes no sense, except as a way of sheltering assumptions about Britain and Europe—as movie set, dream vacation, island of rationality, and cultural holy land—of which Americans are fond. Marilynne Robinson, Harper's magazine, "Is Poverty Necessary?," 10 June 2019 Chess was long considered the epitome of human strategic thought, a symbol of calculating rationality and intellect. Jeremy Kahn, Fortune, "A New A.I. Is Running the Table Against Poker Pros. Is Business Strategy Next?," 11 July 2019 And the tendency to obsess over reason and rationality overlooks this fact. Sean Illing, Vox, "Why science can’t replace religion," 4 Nov. 2018 Human decision-making and rationality depend on a lot more than just following rules, which machines are good at. Zachary Fryer-biggs, The Verge, "The Pentagon plans to spend $2 billion to put more artificial intelligence into its weaponry," 8 Sep. 2018 Liv Boeree is a science communicator and TV host specializing in astrophysics, rationality, and poker. Liv Boeree, Vox, "How an 18th-century priest gave us the tools to make better decisions," 30 Nov. 2018 Liv Boeree is a science communicator and TV host specializing in astrophysics, rationality, and poker. Liv Boeree, Vox, "How an 18th-century priest gave us the tools to make better decisions," 30 Nov. 2018

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

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First Known Use of rationality

1628, in the meaning defined at sense 1

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4 Aug 2019

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The first known use of rationality was in 1628

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More Definitions for rationality

rationality

noun
ra·​tio·​nal·​i·​ty | \ ˌrash-ə-ˈnal-ət-ē How to pronounce rationality (audio) \
plural rationalities

Medical Definition of rationality

1 : the quality or state of being rational
2 : the quality or state of being agreeable to reason

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More from Merriam-Webster on rationality

Rhyming Dictionary: Words that rhyme with rationality

Nglish: Translation of rationality for Spanish Speakers

Britannica English: Translation of rationality for Arabic Speakers

Britannica.com: Encyclopedia article about rationality

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