irrational
Use Irrational in a sentence
ə adjective
1.
without the faculty of reason; deprived of reason.
2.
without or deprived of normal mental clarity or sound judgment.
3.
not in accordance with reason; utterly illogical: irrational arguments.
4.
not endowed with the faculty of reason: irrational animals.
5.
Mathematics.
a.
(of a number) not capable of being expressed exactly as a ratio of two integers.
b.
(of a function) not capable of being expressed exactly as a ratio of two polynomials.
6.
Algebra. (of an equation) having an unknown under a radical sign or, alternately, with a fractional exponent.
7.
Greek and Latin Prosody.
a.
of or pertaining to a substitution in the normal metrical pattern, especially a long syllable for a short one.
b.
noting a foot or meter containing such a substitution.
noun
8.
Mathematics, irrational number.
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Irrational
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| to excite to impatience or anger |
| incapable of being repressed or restrained; uncontrollable: |
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 irrational
Collins
World English Dictionary
irrational (ɪˈræʃənəl) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —adj | |
| 1. | inconsistent with reason or logic; illogical; absurd |
| 2. | incapable of reasoning |
| 3. | maths |
| a. not rational | |
| b. (as noun): an irrational | |
| 4. | in Greek or Latin verse prosody |
| a. of or relating to a metrical irregularity, usually the occurrence of a long syllable instead of a short one | |
| b. denoting a metrical foot where such an irregularity occurs | |
| ir'rationally | |
| —adv | |
| ir'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
irrational
c.1470, "not endowed with reason" (of beats, etc.), from L. irrationalis "without reason," from in- "not" + rationalis "reason" (see reason). Meaning "illogical, absurd" is attested from 1641.
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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Example sentences
One of the trickiest problems in dealing with an uncertain future is people's seemingly irrational response to it.
In fact, it's irrational exuberance that creates all bubbles.
There is so much irrational ideation and even paranoia that seems to be involved.
It seems irrational to feel the trees closing behind you, as if the forest is cutting you off from the present.
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