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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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   adjective. uk / ˈræʃ. ə n. ə l / us / ˈræʃ. ə n. ə l / Add to word list. C1. based on clear thought and reason: There must be some rational explanation for what happened. a rational act / course of action. a rational argument / decision. He was too upset to be rational. Fewer examples. In that state of mind you can't make a rational decision.

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

   www.merriam-webster.com › dictionary › rational

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   1. a. : having reason or understanding. b. : relating to, based on, or agreeable to reason : reasonable. a rational explanation. rational behavior. 2. : involving only multiplication, division, addition, and subtraction and only a finite number of times. 3. : relating to, consisting of, or being one or more rational numbers.

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

   www.collinsdictionary.com › dictionary › english

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   designating or of a real number or quantity expressible as the ratio of two integers, with the second integer not being equal to zero: all integers and fractions are rational numbers. see also irrational (sense 3) b. designating a function expressible as the quotient of two polynomials.

5. 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.

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

   www.thefreedictionary.com › rational

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   rational. ( ˈræʃənəl) adj. 1. using reason or logic in thinking out a problem. 2. in accordance with the principles of logic or reason; reasonable. 3. of sound mind; sane: the patient seemed quite rational. 4. endowed with the capacity to reason; capable of logical thought: man is a rational being. 5.

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

   dictionary.cambridge.org › dictionary › learner-english

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   RATIONAL definition: 1. based on facts and not affected by someone's emotions or imagination: 2. able to make decisions…. Learn more.

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

   www.oxfordlearnersdictionaries.com › definition › english

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   Definition of rational adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

9. www.yourdictionary.com › rationalRational Definition & Meaning | YourDictionary

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   Designating or of a real number or quantity expressible as the ratio of two integers, with the second integer not being equal to zero: all integers and fractions are rational numbers. Webster's New World

10. www.ldoceonline.com › dictionary › rationalrational | meaning of rational in Longman Dictionary of...

    www.ldoceonline.com › dictionary › rational

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    rational meaning, definition, what is rational: rational thoughts, decisions etc are bas...: Learn more.

11. www.britannica.com › dictionary › rationalRational Definition & Meaning | Britannica Dictionary

    www.britannica.com › dictionary › rational

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    RATIONAL meaning: 1 : based on facts or reason and not on emotions or feelings; 2 : having the ability to reason or think about things clearly.