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- DictionaryIr·ra·tion·al/i(r)ˈraSH(ə)nəl/
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 nonrecurring 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.
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…
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. (of a number) not capable of being expressed exactly as a ratio of two integers.
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.
Aug 7, 2012 · 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)
If you describe someone's feelings and behaviour as irrational, you mean they are not based on logical reasons or clear thinking.
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. 3.
Jun 2, 2024 · irrational (comparative more irrational, superlative most irrational) Not rational; unfounded or nonsensical.
Definition of irrational adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
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. (of a number) not capable of being expressed exactly as a ratio of two integers.
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.
