rational

rational, reasonable may be applied to men, their acts, utterances, or policies in the senses of having or manifesting the power to reason, or of being in accordance with what reason dictates as right, wise, or sensible.
Rational usually implies a latent or active power to make inferences from the facts and to draw from such inferences conclusions that enable one to understand the world about him and to relate such knowledge to the attainment of personal and common ends; often, in this use, rational is opposed to emotional or animal
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we are rational; but we are animal too— Cowper

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the rational, the intelligent, the orderly processes of behavior— Mumford

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to cure this habit of mind, it is necessary ... to replace fear by rational prevision of misfortune— Russell

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When the term is applied to policies, projects, systems, or to something conceived or formulated, rational is preferred when justification on grounds that are satisfactory to the reason is specifically implied
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the advantages of a rational orthography—G randgent

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let's just entertain the notion as a rational hypothesis which may or may not be true— Mailer

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Reasonable usually carries a much weaker implication than rational of the power to reason in general, or of guidance by conclusions drawn by the reasoning powers; typically it applies to actions, decisions, choices, or proposals that avoid obvious mistakes and that are practical, sensible, just, or fair
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if that belief, whether right or wrong, may be held by a reasonable man, it seems to me that it may be enforced by law— Justice Holmes

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asking me some reasonable if openly ignorant questions about the nature of the bullfight— Mailer

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the formation of reasonable habits, of method, of punctuality . . . makes enormously for the happiness and convenience of every one about us— Benson

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Antonyms: irrational: animal (of nature): demented (of state of mind): absurd (of actions, behavior)

New Dictionary of Synonyms. 2014.

Synonyms:

Look at other dictionaries:

  • Rational — Ra tion*al (r[a^]sh [u^]n*al), a. [L. rationalis: cf. F. rationnel. See {Ratio}, {Reason}, and cf. {Rationale}.] 1. Relating to the reason; not physical; mental. [1913 Webster] Moral philosophy was his chiefest end; for the rational, the natural …   The Collaborative International Dictionary of English

  • rational — rational, aux [ rasjɔnal, o ] n. m. • racionale XIIIe; lat. rationale ♦ Didact. 1 ♦ Antiq. Pièce d étoffe ornée de pierreries que le grand prêtre des Hébreux portait sur la poitrine. ⇒ pectoral. 2 ♦ (a. fr. livre rational « livre de raison »; lat …   Encyclopédie Universelle

  • Rational AG — Rechtsform Aktiengesellschaft ISIN DE0007010803 Gründung …   Deutsch Wikipedia

  • raţional — RAŢIONÁL, Ă, raţionali, e, adj. 1. (Adesea adverbial) Conform cu principiile şi cerinţele raţiunii; care poate fi conceput cu ajutorul raţiunii. ♦ (În filozofia raţionalistă) Izvorât sau dedus din raţiune, considerat ca independent de experienţă… …   Dicționar Român

  • Rational — may refer to: * Rationality, a concept of reason * Rational number, a number that can be expressed as a ratio of two integers * Rational function, a mathematical function which can be written as the ratio of two polynomial functions * Rational… …   Wikipedia

  • Rational — steht für: das vernunftbegabte und somit rationale Handeln, siehe Rationalität Rational AG, größter Hersteller von Heißluftdämpfern Rational (Heatley Gresham), eine Automobilmarke Rational Software, ehemaliges Softwareunternehmen inzwischen von… …   Deutsch Wikipedia

  • rational — [rash′ən əl] adj. [ME racional < L rationalis < ratio: see REASON] 1. of, based on, or derived from reasoning [rational powers] 2. able to reason; reasoning; in possession of one s reason or sanity 3. showing reason; not foolish or silly;… …   English World dictionary

  • rational — ra·tio·nal / ra shə nəl/ adj 1: having reason or understanding 2: relating to, based on, or guided by reason, principle, fairness, logic, a legitimate state interest, or a consideration of fact age distinctions are not subject to strict scrutiny …   Law dictionary

  • Rational — (v. lat.), 1) vernünftig; 2) (Rationell), vernunftgemäß, auf Ergebnisse eigner Prüfung u. vernünftigen Gründen beruhend, daher theils dem positiven, theils dem blos empirischen u. praktischen entgegengesetzt, s. u. Rationalismus 1); 3) rational… …   Pierer's Universal-Lexikon

  • Rational — Ra tion*al, n. A rational being. Young. [1913 Webster] …   The Collaborative International Dictionary of English

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