1828 dictionary Noah Webster's 1828 American Dictionary 1828 webster
Noah Webster's 1828 American Dictionary
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1828 dictionary(9) Words.

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R  ›  rational
R  ›  rational
1828 Definition

RA'TIONAL, a. [L. rationalis.]

1. Having reason or the faculty of reasoning; endowed with reason; opposed to irrational; as, man is a rational being; brutes are not rational animals.

It is our glory and happiness to have a rational nature.

2. Agreeable to reason; opposed to absurd; as a rational conclusion or inference; rational conduct.

3. Agreeable to reason; not extravagant.

4. Acting in conformity to reason; wise; judicious; as a rational man.

RA'TIONAL, n. A rational being.

1913 Definition
Rational (rational)
a.(r1913 webster dictionarysh"1913 webster dictionaryn*al)
Ra"tion*al
[L. rationalis: cf. F. rationnel. See Ratio, Reason, and cf. Rationale.]
  1. Relating to the 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. Sir T. North.

  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. Law.

  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 formulæ. 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 exact 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 irrational; 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 desires or plans; a reasonable charge; a reasonable prospect of success.

    What higher in her society thou find'st
    Attractive, human, rational, love still.
    Milton.

    A law may be reasonable in itself, although a man does not allow it, or does not know the reason of the lawgivers. Swift.

  5. A rational being.
    Young.

1828 dictionary
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Noah Webster was born on Monday, October 16th, 1758 making him a Libra, Yin Fire Ox [Ding-chou].
  




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