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.

Rational decisions and thoughts are based on reason rather than on emotion. He's asking you to look at both sides of the case and come to a rational decision.

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

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

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

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Sep 22, 2025 · rational (plural rationals) (mathematics) A rational number: a number that can be expressed as the quotient of two integers.

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.