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

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

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 …

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

“We strive for precision in our cooking, in our kitchens and in our restaurants, and RATIONAL has become one of those fundamental pieces of equipment that we rely on.”

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.

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.