RA'TIONAL, adjective [Latin 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, noun A rational being.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI