Adjective
1. consistent with or based on or using reason;
"rational behavior""a process of rational inference""rational thought"2. 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. capable of being expressed as a quotient of integers;
"rational numbers"4. having its source in or being guided by the intellect (distinguished from experience or emotion);
"a rational analysis"