1. Consistent with or based on or using reason
   "rational thought"; "rational behaviour"; "a process of rational inference"
    
2. Of or associated with or requiring the use of the mind
   "the triumph of the rational over the animal side of man";
   - intellectual, noetic
    
3. (mathematics) capable of being expressed as a quotient of integers
   "rational numbers"
    
4. Having its source in or being guided by the intellect (as distinguished from experience or emotion)
   "a rational analysis"

1. An integer or a fraction
   "1/2 is a rational number";
   - rational number

Derived forms: rationals

See also: coherent, demythologised [Brit], demythologized, intellectual, intelligent, logical, lucid, mental, reasonable, reasoning, sane, sensible, thinking

Type of: real, real number

Antonym: irrational

Encyclopedia: Rational