The meaning of RATIONAL is having reason or understanding. How to use rational in a sentence.

RATIONAL definition: 1. based on clear thought and reason: 2. (of a number) that can be expressed as the ratio of two…. Learn more.

Rational definition: agreeable to reason; reasonable; sensible.. See examples of RATIONAL used in a sentence.

Definition of rational adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

A rational person is someone who is sensible and is able to make decisions based on intelligent thinking rather than on emotion. Did he come across as a sane rational person? Rachel looked …

Define rational. rational synonyms, rational pronunciation, rational translation, English dictionary definition of rational. adj. 1. Having or exercising the ability to reason.

There are 17 meanings listed in OED's entry for the word rational, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

agreeable to reason; reasonable; sensible: a rational plan for economic development. having or exercising reason, sound judgment, or good sense: a calm and rational negotiator. being in or …

Sep 27, 2025 · Rationalism, in Western philosophy, the view that regards reason as the chief source and test of knowledge. Holding that reality itself has an inherently logical structure, …

Synonyms for RATIONAL: intelligent, reasoning, reasonable, thinking, logical, analytical, mental, analytic; Antonyms of RATIONAL: irrational, unreasonable, nonrational, unthinking, …