adjective
- An example of rational is the provable idea of gravity.
- An example of rational is a person who apologizes after an argument when he knows he was at fault.
The definition of rational is something that makes sense or that could be based in fact or someone who behaves and thinks logically.
rational
- of, based on, or derived from reasoning: rational powers
- able to reason; reasoning; in possession of one's reason or sanity
- showing reason; not foolish or silly; sensible: a rational argument
- Math.
- designating or of a real number or quantity expressible as the ratio of two integers, with the second integer not being equal to zero: all integers and fractions are rational numbers
- designating a function expressible as the quotient of two polynomials
Origin of rational
Middle English racional from Classical Latin rationalis from ratio: see reasonrational
adjective
- Having or exercising the ability to reason. See Synonyms at logical.
- Consistent with or based on reason or good judgment; logical or sensible: rational decisions.
- Of sound mind; sane: wondered if the eccentric neighbor was not completely rational.
- Mathematics Capable of being expressed as a quotient of integers.
noun
MathematicsA rational number.
Origin of rational
Middle English racional from Old French racionel from Latin ratiōnālis from ratiō ratiōn- reason ; see reason .Related Forms:
- ra′tion·al·ly
adverb
- ra′tion·al·ness
noun
rational
Adjective
(comparative more rational, superlative most rational)
- Capable of reasoning.
- Man is a rational creature.
- Logically sound; not contradictory or otherwise absurd.
- His statements were quite rational.
- (of a person or personal characteristics) Healthy or balanced intellectually; exhibiting reasonableness.
- rational conduct
- (mathematics, arithmetic, number theory, not comparable) Of a number, capable of being expressed as the ratio of two integers.
- is a rational number, but âˆš2 is an irrational number.
- (mathematics, arithmetic, not comparable) Of an algebraic expression, capable of being expressed as the ratio of two polynomials.
- (chemistry) Expressing the type, structure, relations, and reactions of a compound; graphic; said of formulae.
terms etymologically related to rational
Origin
From Old French rationel, rational, from Latin rationalis (“of or belonging to reason, rational, reasonable"), from ratio (“reason")
Noun
(plural rationals)