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1. (a) consistent with or based on or using reason; "rational behavior" "a process of rational inference" "rational thought"
2. (s) of or associated with or requiring the use of the mind; "intellectual problems" "the triumph of the rational over the animal side of man"
3. (a) capable of being expressed as a quotient of integers; "rational numbers"
4. (s) having its source in or being guided by the intellect (distinguished from experience or emotion) "a rational analysis"
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