rationality

noun
ra·tio·nal·i·ty | \ˌra-shə-ˈna-lə-tē \
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

The computer, which is the result of a five-year project, processes speech and is equipped with human-like thought and rationality. Fox News, "IBM computer taps AI to successfully debate humans," 19 June 2018 The fact that Kingelez’s projects are unrealizable shields them from any nattering rationality. Peter Schjeldahl, The New Yorker, "The Utopian Vision of Bodys Isek Kingelez," 4 June 2017 That's because their arrogance outweighs their rationality. Glenn Garvin, miamiherald, "In Nicaragua, the political battle is moving from the streets to the negotiating table," 5 May 2018 Liv Boeree is a science communicator and TV host specializing in astrophysics, rationality, and poker. Liv Boeree, Vox, "Why haven’t we found aliens yet?," 3 July 2018 The stockmarket, in so far as rationality can be ascribed to it, came down on the side of those saying that the central bank has not really started to ease. The Economist, "China starts easing monetary policy. Or does it?," 30 June 2018 That’s because the process of trade itself may enhance human rationality. Richard B. Mckenzie, WSJ, "People Aren’t Rational, and That’s Why We Need Free Trade," 15 June 2018 That's because their arrogance outweighs their rationality. Glenn Garvin, miamiherald, "In Nicaragua, the political battle is moving from the streets to the negotiating table," 5 May 2018 The dream of the 18th century was that a single, coherent set of values, rooted in rationality, could make a heaven on Earth. Alison Gopnik, The Atlantic, "When Truth and Reason Are No Longer Enough," 17 Mar. 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.

See More

First Known Use of rationality

1628, in the meaning defined at sense 1

Keep scrolling for more

Learn More about rationality

Share rationality

Statistics for rationality

Last Updated

29 Sep 2018

Look-up Popularity

Time Traveler for rationality

The first known use of rationality was in 1628

See more words from the same year

Keep scrolling for more

More Definitions for rationality

rationality

noun
ra·tio·nal·i·ty | \ˌrash-ə-ˈnal-ət-ē \
plural rationalities

Medical Definition of rationality 

1 : the quality or state of being rational

2 : the quality or state of being agreeable to reason

Keep scrolling for more

Comments on rationality

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

WORD OF THE DAY

exaggeratedly or childishly emotional

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ

Love words? Need even more definitions?

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