Learn how to say Rational correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word rational:
1based on or in accordance with reason or logic:
I’m sure there’s a perfectly rational explanation
able to think sensibly or logically:
Ursula’s upset—she’s not being very rational
endowed with the capacity to reason:
man is a rational being
2 Mathematics (of a number, quantity, or expression) expressible, or containing quantities which are expressible, as a ratio of whole numbers.
late Middle English (in the sense ‘having the ability to reason’): from Latin rationalis, from ratio(n-) ‘reckoning, reason’ (see ratio)