rational
Use Rational in a sentence
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ə adjective
1.
agreeable to reason; reasonable; sensible: a rational plan for economic development.
2.
having or exercising reason, sound judgment, or good sense: a calm and rational negotiator.
3.
being in or characterized by full possession of one's reason; sane; lucid: The patient appeared perfectly rational.
4.
endowed with the faculty of reason: rational beings.
5.
of, pertaining to, or constituting reasoning powers: the rational faculty.
6.
proceeding or derived from reason or based on reasoning: a rational explanation.
7.
Mathematics.
a.
capable of being expressed exactly by a ratio of two integers.
b.
(of a function) capable of being expressed exactly by a ratio of two polynomials.
8.
Classical Prosody. capable of measurement in terms of the metrical unit or mora.
noun
9.
Mathematics, rational number.
00:10
Rational
is always a great word to know.
So is zedonk. Does it mean:
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| the offspring of a zebra and a donkey. |
Origin:
1350–1400; Middle English racional < Latin ratiōnālis, equivalent to ratiōn- (stem of ratiō) reason + -ālis -al1
1350–1400; Middle English racional < Latin ratiōnālis, equivalent to ratiōn- (stem of ratiō) reason + -ālis -al1
Related forms
ra·tion·al·ly, adverb
ra·tion·al·ness, noun
an·ti·ra·tion·al, adjective
an·ti·ra·tion·al·ly, adverb
hy·per·ra·tion·al, adjective
hy·per·ra·tion·al·ly, adverb
non·ra·tion·al, adjective
non·ra·tion·al·ly, adverb
o·ver·ra·tion·al, adjective
o·ver·ra·tion·al·ly, adverb
pre·ra·tion·al, adjective
qua·si-ra·tion·al, adjective
qua·si-ra·tion·al·ly, adverb
trans·ra·tion·al, adjective
trans·ra·tion·al·ly, adverb
ul·tra·ra·tion·al, adjective
ul·tra·ra·tion·al·ly, adverb
un·ra·tion·al, adjective
un·ra·tion·al·ly, adverb
Antonyms
2. stupid. 3. insane.
2. stupid. 3. insane.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To rational
Collins
World English Dictionary
rational (ˈræʃənəl) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —adj | |
| 1. | using reason or logic in thinking out a problem |
| 2. | in accordance with the principles of logic or reason; reasonable |
| 3. | of sound mind; sane: the patient seemed quite rational |
| 4. | endowed with the capacity to reason; capable of logical thought: man is a rational being |
| 5. | maths expressible as a ratio of two integers or polynomials: a rational number; a rational function |
| —n | |
| 6. | maths a rational number |
| [C14: from Latin ratiōnālis, from ratiō | |
| 'rationally | |
| —adv | |
| 'rationalness | |
| —n | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History
rational
late 14c., "endowed with reason," from L. rationalis "of or belonging to reason, reasonable," from ratio (gen. rationis) "reckoning, calculation, reason" (see ratio). Rationalist "physician whose treatment is based on reason" is from 1620s; applied to a philosophical doctrine
1640s. Rationalize is first recorded 1803, "to explain, to make reasonable;" in the psychological sense of "to give an explanation that conceals true motives" it dates from 1922.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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FOLDOC
Computing Dictionary
rational definition
[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.
Example sentences
Well thank goodness the fossil fuel industry is based on sound economics and rational politics.
The discussion is interesting, because today our superficial rational mind finds its limits and believes in the human ego alone.
So rational busy people should measure time more accurately, and manage it more efficiently.
Evolutionary economics explains why irrational financial choices were once rational.
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