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Definition of Rational


  1. Relating to the reason; not physical; mental.
  2. Having reason, or the faculty of reasoning; endowed with reason or understanding; reasoning.
  3. Agreeable to reason; not absurd, preposterous, extravagant, foolish, fanciful, or the like; wise; judicious; as, rational conduct; a rational man.
  4. Expressing the type, structure, relations, and reactions of a compound; graphic; -- said of formulae. See under Formula.
  5. A rational being.

Rational Quotations

The auto industry must acknowledge that a rational transportation policy should seek a balance between individual convenience, the efficient use of limited resources, and urban-living values that protect spaciousness, natural beauty, and human-scale mobility.
Stewart Udall

People who lean on logic and philosophy and rational exposition end by starving the best part of the mind.
William Butler Yeats

Human decision-making is complex. On our own, our tendency to yield to short-term temptations, and even to addictions, may be too strong for our rational, long-term planning.
Peter Singer

Man is a rational animal who always loses his temper when he is called upon to act in accordance with the dictates of reason.
Oscar Wilde

The relationship between parents and children, but especially between mothers and daughters, is tremendously powerful, scarcely to be comprehended in any rational way.
Joyce Carol Oates
More "Rational" Quotations

Rational Translations

rational in Dutch is redelijk, rationeel
rational in French is rationnel
rational in Italian is razionale
rational in Portuguese is racional
rational in Spanish is racional
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