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rational:
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Concise Oxford English Dictionary © 2008 Oxford University Press:
rational/ˈraʃnəl/
▶adjective
  • 1 based on or in accordance with reason or logic.
  • 2 able to think sensibly or logically.
  • 3 having the capacity to reason.
  • 4 Mathematics (of a number, quantity, or expression) expressible, or containing quantities which are expressible, as a ratio of whole numbers.
– derivatives
rationality noun,
rationally adverb.
– origin ME: from L. rationalis, from ratio(n-) (see ratio).



'rational' also found in these Oxford entries:
Forum discussions with the word(s) "rational" in the title:
"Rational motive" or "Rational motivation"
And invoking the guidance of providence, rational ( ), animated by ...
Judicious/rational
Only in the state does man have a rational existence
rational sensible
Rational core
rational people are collectively irrational
Rational spelling - if any
Rational/irrational nouns?

Look up "rational" at Merriam-Webster
Look up "rational" at dictionary.com

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