rational has definitions from the field of mathematics
1
[ adjective ] consistent with or based on or using reason

Examples

"rational behavior" "a process of rational inference" "rational thought"

Used in print

(Jaroslav Pelikan, The Shape of Death: life, death and...)

Thus the image of God is that which makes a man a man and not an oyster ; the similitude of God , by contrast , is that which makes a man a child of God and not merely a rational creature .

(J. H. Hexter, "Thomas More: On the Margins...)

It also overlooks the fact that in a rational lexicon , and quite clearly in More 's lexicon , the opposite of serious is not gay but frivolous , and the opposite of gay is not serious but solemn .

2
[ adjective ] of or associated with or requiring the use of the mind

Synonyms

intellectual noetic

Examples

"intellectual problems" "the triumph of the rational over the animal side of man"

Related terms

mental

3
[ adjective ] of or associated with or requiring the use of the mind

Synonyms

intellectual

Examples

"intellectual problems" "the triumph of the rational over the animal side of man"

Used in print

(John F. Hayward, "Mimesis and Symbol in the Arts"...)

Later abstractive and rational processes may indicate errors of judgment in these apprehensions of value , but the apprehensions themselves are the primary stuff of experience .

Related terms

mental

4
[ adjective ] (math) capable of being expressed as a quotient of integers

Examples

"rational numbers"

Related terms

irrational mathematics ratio

5
[ adjective ] having its source in or being guided by the intellect (distinguished from experience or emotion)

Examples

"a rational analysis"

Related terms

intellectual

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