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1. Dictionary

   Ra·tion·al

   /ˈraSH(ə)nəl/

   

   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-facthardheadedwith both one's feet on the groundunidealisticinformal:joined-upOpposite irrationalillogical
   • ▪ (of a person) able to think clearly, sensibly, and logically: "Andrea'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 balancedclearheadedcompos 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 that are expressible, as a ratio of whole numbers. When expressed as a decimal, a rational number has a finite or recurring expansion.

   noun

   • 1. a rational number.

   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. 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.

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

   dictionary.cambridge.org › dictionary › english

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   adjective. us / ˈræʃ·ə·n ə l / Add to word list. showing clear thought or reason: a rational decision. Obviously, he wasn’t rational. rationally. adverb [ not gradable ] us / ˈræʃ·ə·n ə l·i / It’s hard to behave rationally at such times. (Definition of rational from the Cambridge Academic Content Dictionary © Cambridge University Press)

4. 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.

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

   www.collinsdictionary.com › dictionary › english

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   A rational person is someone who is sensible and is able to make decisions based on intelligent thinking rather than on emotion. Did he come across as a sane rational person? Rachel looked calmer and more rational now.

6. 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.

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.merriam-webster.com › thesaurus › rationalRATIONAL Synonyms: 140 Similar and Opposite Words - ...

   www.merriam-webster.com › thesaurus › rational

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   Synonyms for RATIONAL: intelligent, reasoning, reasonable, thinking, logical, analytical, mental, analytic; Antonyms of RATIONAL: irrational, unreasonable, nonrational, unthinking, unintelligent, unreasoning, stupid, dense.

9. 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.

10. en.wiktionary.org › wiki › rationalrational - Wiktionary, the free dictionary

    en.wiktionary.org › wiki › rational

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    Jun 8, 2024 · rational (plural rationals) (mathematics) A rational number: a number that can be expressed as the quotient of two integers. The quotient of two rationals is again a rational.

11. 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.