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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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Sep 29, 2024 · (mathematics, arithmetic, number theory, not comparable) Of a real number, that cannot be written as the ratio of two integers. The number π is irrational. Antonym: rational. Hyponyms: transcendental, uncomputable. Derived terms. [edit] irrationality. irrationalization.
not based on reason or clear thinking; not reasonable: One of her main themes is the irrational nature of love. (Definition of irrational from the Cambridge Academic Content Dictionary © Cambridge University Press) What is the pronunciation of irrational? Translations of irrational. in Chinese (Traditional) 不理智的，沒有理性的… See more.
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…
Irrational definition: without the faculty of reason; deprived of reason.. See examples of IRRATIONAL used in a sentence.
Usually you use irrational to describe ideas and thoughts that are not based on reason, although emotions and behavior can be irrational too if they don't seem reasonable. Do you jump onto a chair and scream when you see a mouse? If so, you have an irrational fear of mice, or musophobia.
If you describe someone's feelings and behaviour as irrational, you mean they are not based on logical reasons or clear thinking.
adj. 1. inconsistent with reason or logic; illogical; absurd. 2. incapable of reasoning. 3. (Mathematics) maths. a. not rational. b. (as noun): an irrational. 4. (Poetry) prosody (in Greek or Latin verse) a. of or relating to a metrical irregularity, usually the occurrence of a long syllable instead of a short one.
Definition of irrational adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Definitions of 'irrational' If you describe someone's feelings and behaviour 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 'irrational' completely irrational irrational behaviour irrational beliefs More.
lacking sound judgment or logic: an irrational argument. not controlled or governed by reason: irrational behavior. not having the power of reason: Brute animals are irrational beings.
