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.
2.
mathematicsTECH. of a number, not expressible as a ratio of integersTECH.
- The number pi is an irrational number.
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..
Expressions with irrational
💡 Discover popular phrases, idioms, collocations, or phrasal verbs. Click any expression to learn more, listen to its pronunciation, or save it to your favorites.
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
💡 A powerful way to uncover related words, idioms, and expressions linked by the same idea — and explore meaning beyond exact word matches.
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
psychology
metaphor for an irrational fear
psychology
extreme, irrational distrust of others
culture
rituals based on irrational beliefs
beliefs
related to irrational fears or beliefs
mysticism
magical or irrational approach to problems
anger
become very angry or irrational
purposeful actions
seemingly irrational actions that have purpose
fear
irrational fear or suspicion of others
rhetorical question
ask if someone is acting crazy or irrational
foolishness
extremely foolish or irrational
foolish or reckless
extremely foolish, irrational, or dangerously reckless
psychology
irrational hostile attitude towards a group
irrational behavior
behave irrationally and inappropriately
extreme madness
completely insane or irrational
irrational behavior
behaving unusually or irrationally
anger
act extremely angry or 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.
Many mathematical constants are classified as irrational.
View all translations of irrational
Click below to see the appropriate translations facing each meaning.
- French:irrationnel, nombre irrationnel, ...
- German:irrational, irrationale Zahl, ...
- Italian:irrazionale, numero irrazionale, ...
- Spanish:irracional, número irracional, ...
- Portuguese:irracional, número irracional, ...
- Chinese:不合逻辑的, 无理数, ...
- Japanese:不合理な, 無理数, ...
- Arabic:غَيْر عَقْلَانِيّ, عَدَد غَيْر نِسْبِي, ...
- Hebrew:אִי־רַצְיוֹנָלִי, מִסְפָּר אִי רַצְיוֹנָלִי, ...
- Russian:нелогичный, иррациональное число, ...
- Ukrainian:нелогічний, ірраціональне число, ...
- Hindi:अतार्किक, अपरिमेय संख्या, ...
icon to discover related terms: analogies, antonyms, common collocates, words with same roots, umbrella terms… Try with happening or hunch.
icon next to the first example to see two additional options and learn to use new vocabulary naturally.
icon to save words you want to revisit. You can also save a specific meaning by clicking on the