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1. Dictionary

   rational

   /ˈraʃən(ə)l/

   adjective

   • 1. based on or in accordance with reason or logic: "I'm sure there's a perfectly rational explanation" Similar logicalreasonedwell reasonedsensiblereasonablecogentcoherentintelligentwisejudicioussagaciousastuteshrewdperceptiveenlightenedclear-eyedclear-sightedcommonsensicalcommon-sensewell advisedwell groundedsoundsoberprudentcircumspectpoliticdown-to-earthpracticalpragmaticmatter-of-facthard-headedwith both one's feet on the groundunidealisticinformal:joined-upOpposite irrationalillogical
   • ▪ able to think sensibly or logically: "Ursula's upset—she's not being very rational" Similar lucidcoherentsanein one's right mindable to think/reason clearlyof sound mindin possession of all one's facultiesnormalbalancedwell balancedclear-headedcompos mentisinformal:all thereOpposite insane
   • ▪ endowed with the capacity to reason: "man is a rational being" Similar intelligentthinkingdiscriminatingreasoningcognitivementalcerebrallogicalanalyticalconceptualrare:ratiocinative
   • 2. (of a number, quantity, or expression) expressible, or containing quantities which are expressible, as a ratio of whole numbers.

   Word Origin late Middle English (in the sense ‘having the ability to reason’): from Latin rationalis, from ratio(n-) ‘reckoning, reason’ (see ratio).

   Scrabble Points: 8

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2. dictionary.cambridge.org › dictionary › englishRATIONAL | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   Rational means based on clear thought and reason. Learn how to use this adjective in different contexts, such as rational explanation, rational decision, rational argument, and more.

   • English (US)

     RATIONAL meaning: 1. based on clear thought and reason: 2....

   • Simplified

     RATIONAL translate: 头脑清醒的;理智的. Learn more in the Cambridge...

   • Traditional

     RATIONAL translate: 頭腦清醒的;理智的. Learn more in the Cambridge...

   • Znaczenie Rational, Definicja W Cambridge English Dictionary

     RATIONAL definicja: 1. based on clear thought and reason: 2....

   • Rational in Arabic

     RATIONAL translate: عَقْلاني. Learn more in the Cambridge...

   • Rational in Russian

     RATIONAL translate: разумный, рациональный , благоразумный,...

   • Rational: Thai Translation

     RATIONAL translate: สามารถคิดตัดสินใจได้, ซึ่งมีเหตุผล....

3. www.merriam-webster.com › dictionary › rationalRational Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › rational

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   Learn the meaning of rational as an adjective and a noun, with synonyms, examples, and word history. Find out how rational relates to reason, logic, mathematics, and medicine.

4. Videos

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     Introduction to rational and irrational numbers | Algebra I | Khan Academy

     23 Dec 2013

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     investopedia.com

     Rational Behavior: Definition and Example in Economics

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     Rational Equations | Definition, Formula & Examples

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5. www.collinsdictionary.com › dictionary › englishRATIONAL definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   Learn the meaning of rational as an adjective and a noun in mathematics and psychology, and see how to use it in sentences. Find synonyms, pronunciation, and word frequency of rational.

6. www.dictionary.com › browse › rationalRATIONAL Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › rational

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   Rational definition: agreeable to reason;reasonable; sensible. See examples of RATIONAL used in a sentence.

7. dictionary.cambridge.org › dictionary › learner-englishRATIONAL | meaning - Cambridge Learner's Dictionary

   dictionary.cambridge.org › dictionary › learner-english

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   Rational means based on facts and not affected by emotions or imagination, or able to make decisions without being influenced by emotions or imagination. See how to use rational in sentences and compare it with irrational.

8. www.oxfordlearnersdictionaries.com › definition › englishrational adjective - Definition, pictures, pronunciation and...

   www.oxfordlearnersdictionaries.com › definition › english

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   (of a person) able to think clearly and make decisions based on reason rather than emotions synonym reasonable. No rational person would ever behave like that. Try to be rational about it. Humans are essentially rational beings. She said that she had not been fully rational when she signed the form. Topics Personal qualities c1.

9. www.vocabulary.com › dictionary › rationalRational - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › rational

   Use the adjective rational to describe people or ideas that operate according to logic or reason. While your brother has an artistic temperament, you have a rational one. Rational comes from the Latin word rationalis, meaning reasonable or logical.