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- Dictionaryirrational/ɪˈraʃən(ə)l/
adjective
- 1. not logical or reasonable: "irrational feelings of hostility"
- 2. (of a number, quantity, or expression) not expressible as a ratio of two integers, and having an infinite and non-recurring expansion when expressed as a decimal. Examples of irrational numbers are the number π and the square root of 2.
noun
- 1. an irrational number or quantity; a surd.
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uk / ɪˈræʃ. ə n. ə l / us / ɪˈræʃ. ə n. ə l / Add to word list. C2. not using reason or clear thinking: It's totally irrational, but I'm frightened of mice. His parents were worried by his increasingly irrational behaviour. (Definition of irrational from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
The meaning of IRRATIONAL is not rational. How to use irrational in a sentence. not rational: such as; lacking usual or normal mental clarity or coherence; not endowed with reason or understanding…
adjective. without the faculty of reason; deprived of reason. without or deprived of normal mental clarity or sound judgment. not in accordance with reason; utterly illogical: irrational arguments. Synonyms: insensate, ridiculous, unreasonable. not endowed with the faculty of reason: irrational animals. Mathematics.
If you describe someone's feelings and behaviour as irrational, you mean they are not based on logical reasons or clear thinking.
noun. a real number that cannot be expressed as a rational number. synonyms: irrational number.
Definition of irrational adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
adj. 1. a. Not endowed with reason. b. Affected by loss of usual or normal mental clarity; incoherent, as from shock. c. Marked by a lack of accord with reason or sound judgment: an irrational dislike. 2. a. Being a syllable in Greek and Latin prosody whose length does not fit the metric pattern. b. Being a metric foot containing such a syllable.
Definitions of 'irrational' If you describe someone's feelings and behavior as irrational, you mean they are not based on logical reasons or clear thinking. [...] More. Synonyms of 'irrational' • illogical, crazy (informal), silly, absurd [...] More. Collocations with the word 'irrational'
Irrational definition: . See examples of IRRATIONAL used in a sentence.
Designating a real number not expressible as an integer or as a quotient of two integers: √3 and pi are irrational numbers. An irrational number. A real number that can not be expressed as the quotient of two integers, an irrational number. (mathematics): transcendental.
