rational

[ra·tion·al]

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.

...

Relating to reason; not physical; mental.

Adjective S.
having its source in or being guided by the intellect (distinguished from experience or emotion); "a rational analysis"

Adjective S.
of or associated with or requiring the use of the mind; "intellectual problems"; "the triumph of the rational over the animal side of man"

Adjective
consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought"

Adjective
capable of being expressed as a quotient of integers; "rational numbers"


a.
Relating to the reason; not physical; mental.

a.
Having reason, or the faculty of reasoning; endowed with reason or understanding; reasoning.

a.
Agreeable to reason; not absurd, preposterous, extravagant, foolish, fanciful, or the like; wise; judicious; as, rational conduct; a rational man.

a.
Expressing the type, structure, relations, and reactions of a compound; graphic; -- said of formulae. See under Formula.

n.
A rational being.


Rational

Ra"tion*al , a. [L. rationalis: cf. F. rationnel. See Ratio, Reason, and cf. Rationale.] 1. Relating to reason; not physical; mental.
Moral philosophy was his chiefest end; for the rational, the natural, and mathematics . . . were but simple pastimes in comparison of the other.
2. Having reason, or the faculty of reasoning; endowed with reason or understanding; reasoning.
It is our glory and happiness to have a rational nature.
3. Agreeable to reason; not absurd, preposterous, extravagant, foolish, fanciful, or the like; wise; judicious; as, rational conduct; a rational man. 4. (Chem.) Expressing the type, structure, relations, and reactions of a compound; graphic; -- said of formul'91. See under Formula. Rational horizon. (Astron.) See Horizon, 2 (b). -- Rational quantity (Alg. ), one that can be expressed without the use of a radical sign, or in extract parts of unity; -- opposed to irrational or radical quantity. -- Rational symptom (Med.), one elicited by the statements of the patient himself and not as the result of a physical examination. Syn. -- Sane; sound; intelligent; reasonable; sensible; wise; discreet; judicious. -- Rational, reasonable. Rational has reference to reason as a faculty of the mind, and is opposed to traditional; as, a rational being, a rational state of mind, rational views, etc. In these cases the speculative reason is more particularly, referred to. Reasonable has reference to the exercise of this faculty for practical purposes, and means, governed or directed by reason; as, reasonable prospect of success.
What higher in her society thou find'st Attractive, human, rational, love still.
A law may be reasonable in itself, although a man does not allow it, or does not know the reason of the lawgivers.

Rational

Ra"tion*al, n. A rational being. Young.

Relating to reason; not physical; mental.

A rational being.

...

Usage Examples

In general I was a good kid. It usually took a lot to make me mad. But once I reached the boiling point, I lost all rational control. Totally without thinking, when my anger was aroused, I grabbed the nearest brick, rock, or stick to bash someone. It was as if I had no conscious will in the matter.

Architecture is not an inspirational business, it's a rational procedure to do sensible and hopefully beautiful things that's all.

In a completely rational society, the best of us would be teachers and the rest of us would have to settle for something else.

I approve designs not because I think I am more gifted or somebody who can see ahead three or four years from now, but just to make sure that the design is a logical, rational decision, taken after analyzing pros and cons.

I add this, that rational ability without education has oftener raised man to glory and virtue, than education without natural ability.

Faith is an act of rational choice, which determines us to act as if certain things were true, and in the confident expectation that they will prove to be true.

Good fellowship and friendship are lasting, rational and manly pleasures.

Misspelled Form

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Other Usage Examples

Gardening is not a rational act.

Illogical thinkers throw names and slurs around because they have no arguments with which to rebut their opponents. Rational people have to keep hammering their points home.

Anything that gives us new knowledge gives us an opportunity to be more rational.

If women are supposed to be less rational and more emotional at the beginning of our menstrual cycle when the female hormone is at its lowest level, then why isn't it logical to say that, in those few days, women behave the most like the way men behave all month long?

As long as you have a system that is based on the rational that if you are making money you are thereby making a contribution to society, these financial rogue practices will continue.

Indeed, in view of its function, religion stands in greater need of a rational foundation of its ultimate principles than even the dogmas of science.

A man can believe a considerable deal of rubbish, and yet go about his daily work in a rational and cheerful manner.

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