rational
Capable of reasoning.
Example
“Man is a rational creature.”
Other meanings
Behaving according to some partial order of preferences.
Logically sound; not self-contradictory or otherwise absurd.
“His statements were quite rational.”
Word history
From Latin "rationalis".
Where this comes from
This definition is adapted from “rational” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.