rational

8 ENTRIES FOUND:

1ra·tio·nal

adjective \ˈrash-nəl, ˈra-shə-nəl\

: based on facts or reason and not on emotions or feelings

: having the ability to reason or think about things clearly

Full Definition of RATIONAL

1
a :  having reason or understanding
b :  relating to, based on, or agreeable to reason :  reasonable <a rational explanation> <rational behavior>
2
:  involving only multiplication, division, addition, and subtraction and only a finite number of times
3
:  relating to, consisting of, or being one or more rational numbers <a rational root of an equation>
ra·tio·nal·ly adverb
ra·tio·nal·ness noun

Examples of RATIONAL

  1. <human beings are rational creatures>
  2. <insisted there was a rational explanation for the strange creaking noises and that there were no such things as ghosts>

Origin of RATIONAL

Middle English racional, from Anglo-French racionel, from Latin rationalis, from ration-, ratio
First Known Use: 14th century

Rhymes with RATIONAL

2rational

noun

Definition of RATIONAL

:  something rational; specifically :  rational number

First Known Use of RATIONAL

1606

ra·tio·nal

adjective \ˈrash-nəl, -ən-əl\   (Medical Dictionary)

Medical Definition of RATIONAL

1
a : having reason or understanding b : relating to, based on, or agreeable to reason <a rational explanation> <rational behavior>
2
: using medical treatments based on reason or general principles—used especially of an ancient school of physicians; compare empirical 1a
ra·tio·nal·ly \-ē\ adverb

Browse

Next Word in the Dictionary: rationale
Previous Word in the Dictionary: ration (transitive verb)
All Words Near: rational

Seen & Heard

What made you want to look up rational? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More