Rational Definition
răshə-nəl
adjective
Of, based on, or derived from reasoning.
Rational powers.
Webster's New World
Able to reason; reasoning; in possession of one's reason or sanity.
Webster's New World
Showing reason; not foolish or silly; sensible.
A rational argument.
Webster's New World
Of sound mind; sane.
Wondered if the eccentric neighbor was not completely rational.
American Heritage
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.
Webster's New World
Synonyms:
Other Word Forms of Rational
Noun
Singular:
rational
Plural:
rationalsOrigin of Rational
-
From Old French rational, from Medieval Latin rationale (“a pontifical stole, a pallium, an ornament worn over the chasuble"), neuter of Latin rationalis (“rational"), for which see the first etymology.
From Wiktionary
-
Middle English racional from Old French racionel from Latin ratiōnālis from ratiō ratiōn- reason reason
From American Heritage Dictionary of the English Language, 5th Edition
-
From Old French rationel, rational, from Latin rationalis (“of or belonging to reason, rational, reasonable"), from ratio (“reason")
From Wiktionary
Find Similar Words
Find similar words to rational using the buttons below.