# rational

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Related to rational: rational function

## ra·tion·al

(răsh′ə-nəl)*adj.*

**1.**Having or exercising the ability to reason. See Synonyms at logical.

**2.**Consistent with or based on reason or good judgment; logical or sensible: rational decisions.

**3.**Of sound mind; sane: wondered if the eccentric neighbor was not completely rational.

**4.**

*Mathematics*Capable of being expressed as a quotient of integers.

*n.*

*Mathematics*

A rational number.

[Middle English racional, from Old French racionel, from Latin ratiōnālis, from ratiō, ratiōn-,

*reason*; see**reason**.]**ra′tion·al·ly**

*adv.*

**ra′tion·al·ness**

*n.*

## rational

(ˈræʃənəl)*adj*

**1.**using reason or logic in thinking out a problem

**2.**in accordance with the principles of logic or reason; reasonable

**3.**of sound mind; sane: the patient seemed quite rational.

**4.**endowed with the capacity to reason; capable of logical thought: man is a rational being.

**5.**(Mathematics)

*maths*expressible as a ratio of two integers or polynomials: a rational number; a rational function.

*n*

(Mathematics)

*maths*a rational number[C14: from Latin

*ratiōnālis*, from*ratiō*reason]**ˈrationally**

*adv*

**ˈrationalness**

*n*

## ra•tion•al

(ˈræʃ ə nl, ˈræʃ nl)*adj.*

**1.**based on or agreeable to reason: a rational decision.

**2.**exercising reason: a rational negotiator.

**3.**sane; lucid: The patient seems rational.

**4.**

*Math.*

**a.**capable of being expressed exactly by a ratio of two integers.

**b.**(of a function) capable of being expressed exactly by a ratio of two polynomials.

*n.*

[1350–1400; Middle English

*racional*< Latin*ratiōnālis*=*ratiōn-*(s. of*ratiō*) reason +*-ālis*-al^{1}]**ra′tion•al•ly,**

*adv.*

## reasonable

–**rational**

**1.**

**'reasonable'**

When someone is **reasonable,** they behave in a fair and sensible way.

*Our mother was always very*

__reasonable.__*I can't do that, Morris. Be*

__reasonable.__If something such as a proposal or judgement is **reasonable,** it is acceptable because it is fair or sensible.

*Rules and procedures need to be accepted as*

__reasonable__by those who operate them.*There was no*

__reasonable__explanation for her decision.**2.**

**'rational'**

You say that someone is **rational** when they are able to think clearly and make decisions and judgements based on reason rather than emotion.

*Let's talk about this like two*

__rational__people.You can also describe people's behaviour as **rational.**

*This was a totally*

__rational__response to a set of complex problems.ThesaurusAntonymsRelated WordsSynonyms

**Legend:**Switch to new thesaurus

Noun | 1. | rational - an integer or a fractionreal, real number - any rational or irrational number fraction - the quotient of two rational numbers |

Adj. | 1. | rational - consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought"logical - capable of or reflecting the capability for correct and valid reasoning; "a logical mind" reasonable, sensible - showing reason or sound judgment; "a sensible choice"; "a sensible person" sane - mentally healthy; free from mental disorder; "appears to be completely sane" irrational - not consistent with or using reason; "irrational fears"; "irrational animals" |

2. | rational - 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 - 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" | |

3. | rational - capable of being expressed as a quotient of integers; "rational numbers"math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement irrational - real but not expressible as the quotient of two integers; "irrational numbers" | |

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

## rational

*adjective*

**1.**sensible, sound, wise, reasonable, intelligent, realistic, logical, enlightened, sane, lucid, judicious, sagacious a rational decision

**2.**reasoning, thinking, cognitive, cerebral, ratiocinative Man, as a rational being, may act against his impulses.

**3.**sane, balanced, normal, all there

*(informal)*, lucid, of sound mind, compos mentis

*(Latin)*, in your right mind Rachel looked calmer and more rational now.

**unreasonable, insane, irrational, unsound**

*sane*## rational

*adjective*

**1.**Able to reason validly:

**2.**Possessing, proceeding from, or exhibiting good judgment and prudence:

**3.**Mentally healthy:

**4.**Consistent with reason and intellect:

Translations

**racionální**

**rozumný**

**rozumový**

**rationel**

**fornuftig**

**järkevä**

**järkiperäinen**

**rationaalinen**

**järjellinen**

**järkeenkäypä**

**racionalan**

**razborit**

**razuman**

**ésszerű**

**racionális**

**skynsamlegur**

**skynsamur; vitsmuna-**

**理にかなった**

**합리적인**

**protaujantis**

**racionaliai**

**racionalumas**

**racionalus**

**domājošs**

**loģisks**

**saprātīgs**

**rationell**

**ซึ่งมีเหตุผล**

**hợp lý**

## rational

*adj*

(= sensible, reasonable)

*person, action, thinking*→ vernünftig, rational;*activity, solution*→ vernünftig, sinnvoll; (Med: = lucid, sane)*person*→ bei klarem Verstand; it was the only**rational**thing to do → es war das einzig Vernünftige(Math) → rational

## rational

(ˈraʃənl)*adjective*

**1.**able to think, reason and judge

*etc*. Man is a rational animal.

**2.**sensible; reasonable; logical; not (over-) influenced by emotions

*etc*. There must be a rational explanation for those strange noises

**ˈrationally**

*adverb*

**ˌrationˈality**

*noun*

## rational

→ عَقْلانِيّ racionální rationel vernünftig έλλογος racional järkevä rationnel racionalan razionale 理にかなった 합리적인 rationeel rasjonell rozsądny racional рациональный rationell ซึ่งมีเหตุผล akıllıca hợp lý 理性的## ra·tion·al

*a.*racional, cuerdo-a, basado-a en la razón.