definitions

# rational

[rash-uh-nl, rash-nl]
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Mathematics.

## Origin of rational

1350–1400; Middle English racional < Latin ratiōnālis, equivalent to ratiōn- (stem of ratiō) reason + -ālis -al1
Can be confusedrational reasonable (see synonym study at reasonable)

## Synonyms for rational

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

## Antonyms for rational

2. stupid. 3. insane.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

## Examples from the Web for pre-rational

### Historical Examples of pre-rational

• We must return, however, for a few paragraphs to the general consideration of what may be called our pre-rational beliefs.

• The catalogue of pre-rational beliefs or impulses to believe, is considerable, and might easily be enlarged.

• To put our viewpoint somewhat differently, language is primarily a pre-rational function.

Language

Edward Sapir

British Dictionary definitions for pre-rational

## rational

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

## 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

Word Origin and History for pre-rational

## rational

late 14c., "pertaining to reason;" mid-15c., "endowed with reason," from Old French racionel and directly from Latin rationalis "of or belonging to reason, reasonable," from ratio (genitive rationis) "reckoning, calculation, reason" (see ratio).

Online Etymology Dictionary, © 2010 Douglas Harper

pre-rational in Medicine

[răshə-nəl]