irrational
ɪˈræʃənl̩
Definition Synonyms

Definition of irrational - Reverso English Dictionary

Adjective

1.
illogicalnot based on logical reasons or clear thinking
  • His fear of cats is completely irrational.
absurd illogical unreasonable
2.
mathematicsTECH.of a number, not expressible as a ratio of integersTECH.
  • The number pi is an irrational number.
surd
3.
literatureTECH.relating to metrical irregularity in poetryTECH.
  • The poem uses an irrational metrical foot.

Noun

mathematicsTECH.number that cannot be expressed as a simple fractionTECH.
  • The square root of two is an example of an irrational..
transcendental
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Expressions with irrational

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excessive enthusiasm without basis in reality
His irrational exuberance led him to invest heavily in the failing company.
action driven by emotion not reason
Buying the expensive watch was an irrational impulse.
unreasonable anger or hatred towards someone or something
His irrational hostility towards the new policy was evident in the meeting.
motivation not based on reason or logic
His fear of cats was an irrational motive for avoiding the park.
real number not expressible as a fraction
Pi is an irrational number.

Origin of irrational

Latin, irrationalis (not rational)

Terms with irrational included in their meaning

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intense fear
sudden overwhelming fear causing irrational behavior
behavior
most foolish or irrational
mental state
state of being mentally unstable or irrational
irrational
acting irrationally due to strong romantic feelings
communication
speech that is irrational or nonsensical
obsession
irrational obsession with an activity or object
irrational behavior
suddenly behave irrationally or lose control
mental illness
become mentally ill or very irrational

Examples of irrational in a sentence

  • It's irrational to fear flying more than driving.
  • The square root of 2 is an irrational number.
  • Some irrational numbers are used in advanced mathematics.
  • His work is known for its irrational rhythm.
  • The irrational pattern in the verse intrigued scholars.
  • Pi is another well-known irrational in mathematics.

View all translations of irrational

Click below to see the appropriate translations facing each meaning.
  1. French:irrationnel, nombre irrationnel, ...
  2. German:irrational, irrationale Zahl, ...
  3. Italian:irrazionale, numero irrazionale, ...
  4. Spanish:irracional, número irracional, ...
  5. Portuguese:irracional, número irracional, ...
  6. Chinese:不合逻辑的, 无理数, ...
  7. Japanese:不合理な, 無理数, ...
  8. Arabic:غَيْر عَقْلَانِيّ, عَدَد غَيْر نِسْبِي, ...
  9. Hebrew:אִי־רַצְיוֹנָלִי, מִסְפָּר אִי רַצְיוֹנָלִי, ...
  10. Russian:нелогичный, иррациональное число, ...
  11. Ukrainian:нелогічний, ірраціональне число, ...
  12. Hindi:अतार्किक, अपरिमेय संख्या, ...

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