rational

[ rash-uh-nl, rash-nl ]
/ ˈræʃ ə nl, ˈræʃ nl /

adjective

noun

Mathematics. rational number.

QUIZZES

Fend Off Sciolism With This Word Of The Day Quiz
Are you the Cinderella of this week’s quiz? Test your memory on the words and definitions from March 23–29.
Question 1 of 7
schlep

Origin of rational

1350–1400; Middle English racional < Latin ratiōnālis, equivalent to ratiōn- (stem of ratiō) reason + -ālis -al1

SYNONYMS FOR rational

2 intelligent, wise, judicious, sagacious, enlightened.
6 See reasonable.

ANTONYMS FOR rational

OTHER WORDS FROM rational

WORDS THAT MAY BE CONFUSED WITH rational

rational reasonable (see synonym study at reasonable)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for anti-rational

British Dictionary definitions for anti-rational

rational
/ (ˈræʃənəl) /

adjective

using reason or logic in thinking out a problem
in accordance with the principles of logic or reason; reasonable
of sound mind; sanethe patient seemed quite rational
endowed with the capacity to reason; capable of logical thoughtman is a rational being
maths expressible as a ratio of two integers or polynomialsa rational number; a rational function

noun

maths a rational number

Derived forms of rational

rationally, adverbrationalness, noun

Word Origin for rational

C14: from Latin ratiōnālis, from ratiō reason
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for anti-rational

rational
[ răshə-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.