5 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Rational \Ra"tion*al\, n.
A rational being --Young.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
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
--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. (Chem.) Expressing the type structure, relations, and
reactions of a compound; graphic; -- said of formul[ae].
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.
From WordNet r 1.6 [wn]:
rational
adj 1: consistent with or based on or using reason; "rational
behavior"; "a process of rational inference";
"rational thought" [ant: {irrational}]
2: associated with or requiring the use of the mind;
"intellectual problems"; "the triumph of the rational over
the animal side of man" [syn: {intellectual}]
3: (math) capable of being expressed as a quotient of integers;
"rational numbers" [ant: {irrational}]
4: having its source in or being guided by the intellect
(distinguished from experience or emotion); "a rational
analysis"
From The Free On-line Dictionary of Computing (13 Mar 01) [foldoc]:
rational
[Mathematics] a fractional number n/d, where n and d are
integers, n is the numerator and d is the denominator. The
set of all rational numbers is usually called Q.
Computers do not usually deal with rational numbers but
instead convert them to {real} numbers which are represented
(approximately in some cases) as {floating-point} numbers.
Compare {irrational}.
From THE DEVIL'S DICTIONARY ((C)1911 Released April 15 1993) [devils]:
RATIONAL, adj Devoid of all delusions save those of observation,
experience and reflection.
more about rational
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