Nearby Words
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.
EXPANDof, 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.
COLLAPSEClassical Prosody. capable of measurement in terms of the metrical unit or mora.
noun
9.
Mathematics. rational number.
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Rationals
is always a great word to know.
So is interrobang. Does it mean:
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| a gadget; dingus; thingumbob. |
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
EXPANDhy·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
COLLAPSEAntonyms
2. stupid. 3. insane.
2. stupid. 3. insane.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Link To rationals
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
EXPAND1640s. 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.
COLLAPSE
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
rational ra·tion·al (rāsh'ə-nəl)
adj.
Having or exercising the ability to reason.
Influenced by reasoning rather than by emotion.
Of sound mind; sane.
Based on scientific knowledge or theory rather than practical observation.
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.
Cite This Source
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