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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....

   • 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 in Spanish

     RATIONAL translate: racional, racional [masculine-feminine,...

   • Rational in Japanese

     RATIONAL translate: 論理的な, 合理的な, 合理的（ごうりてき）な, 分別（ふんべつ）のある....

   • Rational: Thai Translation

     RATIONAL translate: สามารถคิดตัดสินใจได้, ซึ่งมีเหตุผล....

   • Rational: Czech Translation

     rational - translate into Czech with the English-Czech...

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

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     Rational and Irrational Numbers (Definition & 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.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.

7. www.thefreedictionary.com › rationalRational - definition of rational by The Free Dictionary

   www.thefreedictionary.com › rational

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   Rational means having or using reason, logical, or sensible. It can also refer to a type of number or function in mathematics. See synonyms, antonyms, and usage examples of rational.

8. 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.

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

   www.oxfordlearnersdictionaries.com › definition › english

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   Rational means based on reason rather than emotions. It can describe behaviour, ideas, or people. See how to use rational in sentences and contrast it with irrational.