irrational
/ɪˈɹæʃ.(ə.)nəl/
irrational adjective: not rational; unfounded, nonsensical or wrong-headed.
Adjective
irrational (comparative more irrational, superlative most irrational)
- Not rational; unfounded, nonsensical or wrong-headed.
- an irrational decision
- July 18, 2012, Scott Tobias, AV Club The Dark Knight Riseshttp://www.avclub.com/articles/the-dark-knight-rises-review-batman,82624/
Where the Joker preys on our fears of random, irrational acts of terror, Bane has an all-consuming, dictatorial agenda that’s more stable and permanent, a New World...
- Of a real number, that cannot be written as the ratio of two integers.
- The number π is irrational.
- Antonyms:
- rational
Noun
irrational (plural irrationals)
- A real number that can not be expressed as the quotient of two integers, an irrational number.
- The square root of 2, which was the first irrational to be discovered, was known to the early Pythagoreans, and ingenious methods of approximating to its value were discovered.1946, Bertrand Russell, History of Western Philosophy, I.24
irrational meaning in Hindi, Tamil, Marathi and Urdu
irrational in Hindi
- mathematics: of a number
- अपरिमेय aprimey
irrational in Tamil
- அறிவுக்குப் பொருந்தாத, பகுத்தறிவுக்கு ஒவ்வாத, விகிதமுறா எண், விகிதமுறாத
irrational in Marathi
- तर्कहीन, अतार्किक
irrational in Urdu
- بےدلیل, بےتکا, نامعقول, واہیات
More languagesFewer languages
- irrational in Bengali
- অযৌক্তিক, যুক্তিহীন, বুদ্ধিহীন
- irrational in Telugu
- అసంబద్ధము asambaddhamu
- irrational in Malayalam
- അയുക്തിക, യുക്തിഹീനമായ, യുക്തിവിരുദ്ധ, യുക്തിസഹമല്ലാത്ത
- irrational in Kannada
- ವಿಚಾರಹೀನ, ವಿವೇಕವಿಲ್ಲದ, ವಿಚಾರ ಬುದ್ಧಿಯಿಲ್ಲದ, ತರ್ಕವಿರುದ್ಧ
- irrational in Punjabi
- ਤਰਕਹੀਣ
- irrational in Gujarati
- અતાર્કિક, તર્કહીન
- irrational in Odia
- ଅଯୌକ୍ତିକ
- irrational in Nepali
- तर्कहीन, अतार्किक
- irrational in Tagalog
- atbang, maatbang, ditagwayin, bilang na ditagwayin
- irrational in Vietnamese
- bất hợp lý, số vô tỉ
Examples of irrational in a sentence
- Rational numbers are a countable set, so almost all numbers are irrational.
- When the irrational exuberance finally ended and the central bank took away the punch bowl, the business world belatedly sobered up.
- President Nixon tried to make leaders of communist bloc countries believe he was a volatile, irrational pugilist.
Antonyms of irrational
Forms of irrational
| Adjective | |
|---|---|
| comparative | more irrational |
| superlative | most irrational |
| Noun | |
| plural | irrationals |
Origin of irrational
From Latin irratiōnālis, from ir- + ratiōnālis.
Words formed from irrational
Phrases with irrational
Words that rhyme with irrational
Questions about irrational
- What does irrational mean?
- Irrational means not rational; unfounded, nonsensical or wrong-headed.
- What is irrational in Hindi?
- Irrational in Hindi is अपरिमेय (aprimey). See Irrational meaning in Hindi.
- What part of speech is irrational?
- Irrational can be an adjective or a noun.
- How do you pronounce irrational?
- Irrational is pronounced /ɪˈɹæʃ.(ə.)nəl/.
Words near irrational in the dictionary
Source and license
Adapted from Wiktionary: irrational (page history and authors); irrational (Tamil Wiktionary) (page history and authors); irrational (Marathi, IndicTrans2 machine translation) (model and license); irrational (Urdu Wiktionary) (page history and authors); Irrational (Bengali Wiktionary) (page history and authors); irrational (Olam, E.K. Kurup corpus) (dataset and license); irrational (Kannada Wiktionary) (page history and authors); irrational (Punjabi, IndicTrans2 machine translation) (model and license); irrational (Gujarati, IndicTrans2 machine translation) (model and license); irrational (Odia, IndicTrans2 machine translation) (model and license); irrational (Nepali, IndicTrans2 machine translation) (model and license). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-irrational.wav.
Cite this entry: “irrational.” Word.ws, https://word.ws/irrational. Based on Wiktionary, CC BY-SA 4.0.