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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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   The meaning of RATIONAL is having reason or understanding. How to use rational in a sentence.

4. 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.

5. 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.

6. dictionary.cambridge.org › us › dictionaryRATIONAL | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

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   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. I'm sure there's a perfectly rational explanation for it.

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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   (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.

10. 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.

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.