Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun rational

1 sense of rational

Sense 1
rational number, rational -- (an integer or a fraction)
       => real number, real -- (any rational or irrational number)

Antonyms of adj rational

4 senses of rational

Sense 1
rational (vs. irrational) -- (consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought")

irrational (vs. rational) -- (not consistent with or using reason; "irrational fears"; "irrational animals")
        => blind, unreasoning -- (not based on reason or evidence; "blind hatred"; "blind faith"; "unreasoning panic")
        => reasonless -- (not endowed with the capacity to reason; "a reasonless brute")
        => nonrational -- (not based on reason; "there is a great deal that is nonrational in modern culture")
        => superstitious -- (showing ignorance of the laws of nature and faith in magic or chance; "finally realized that the horror he felt was superstitious in origin")

Sense 2
intellectual, rational, noetic -- (of or associated with or requiring the use of the mind; "intellectual problems"; "the triumph of the rational over the animal side of man")

INDIRECT (VIA mental) -> physical -- (involving the body as distinguished from the mind or spirit; "physical exercise"; "physical suffering"; "was sloppy about everything but her physical appearance")

Sense 3
rational (vs. irrational) -- (capable of being expressed as a quotient of integers; "rational numbers")

irrational (vs. rational) -- (real but not expressible as the quotient of two integers; "irrational numbers")

Sense 4
rational -- (having its source in or being guided by the intellect (as distinguished from experience or emotion); "a rational analysis")

INDIRECT (VIA intellectual) -> nonintellectual -- (not intellectual)

Similarity of adj rational

4 senses of rational

Sense 1
rational (vs. irrational) -- (consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought")
       => coherent, logical, lucid -- (capable of thinking and expressing yourself in a clear and consistent manner; "a lucid thinker"; "she was more coherent than she had been just after the accident")
       => demythologized, demythologised -- (having mythical elements removed)
       => intelligent, reasoning (prenominal), thinking (prenominal) -- (endowed with the capacity to reason)
       => reasonable, sane -- (marked by sound judgment; "sane nuclear policy")
          Also See-> logical#1; reasonable#1, sensible#1; sane#1

Sense 2
intellectual, rational, noetic -- (of or associated with or requiring the use of the mind; "intellectual problems"; "the triumph of the rational over the animal side of man")
       => mental (vs. physical) -- (involving the mind or an intellectual process; "mental images of happy times"; "mental calculations"; "in a terrible mental state"; "mental suffering"; "free from mental defects")

Sense 3
rational (vs. irrational) -- (capable of being expressed as a quotient of integers; "rational numbers")

Sense 4
rational -- (having its source in or being guided by the intellect (as distinguished from experience or emotion); "a rational analysis")
       => intellectual (vs. nonintellectual) -- (appealing to or using the intellect; "satire is an intellectual weapon"; "intellectual workers engaged in creative literary or artistic or scientific labor"; "has tremendous intellectual sympathy for oppressed people"; "coldly intellectual"; "sort of the intellectual type"; "intellectual literature")