RA'TIONAL, a. [L. rationalis.]1. Having reason or the faculty of reasoning; endowed with reason; opposed to irrational; as, man is a rational being; brutes are not rational animals.It is our glory and happiness to have a rational nature.2. Agreeable to reason; opposed to absurd; as a rational conclusion or inference; rational conduct.3. Agreeable to reason; not extravagant.4. Acting in conformity to reason; wise; judicious; as a rational man.
RA'TIONAL, n. A rational being.