Noun

• S: (n) rational number, rational (an integer or a fraction)

Adjective

• S: (adj) rational (consistent with or based on or using reason) "rational behavior"; "a process of rational inference"; "rational thought"
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• similar to
• antonym
• derivationally related form
• S: (adj) intellectual, rational, noetic (of or associated with or requiring the use of the mind) "intellectual problems"; "the triumph of the rational over the animal side of man"
• similar to
• derivationally related form
• antonym
• S: (adj) rational (capable of being expressed as a quotient of integers) "rational numbers"
• S: (adj) rational (having its source in or being guided by the intellect (as distinguished from experience or emotion)) "a rational analysis"