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  1. Dictionary
    ir·ra·tion·al·i·ty
    /ˌi(r)ˌraSHəˈnalədē/

    noun

    • 1. the quality of being illogical or unreasonable: "the sheer irrationality of continuing a policy doomed to failure"
    • 2. the quality of a number, quantity, or expression being irrational: "the irrationality of square roots"

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  2. dictionary.cambridge.org › dictionary › englishIRRATIONALITY | English meaning - Cambridge Dictionary

    Irrationality is the fact of not using reason or clear thinking. Learn how to pronounce and translate irrationality in different languages, and see examples of its usage in sentences.

    • English (US)

      the fact of not using reason or clear thinking: The play is...

  3. www.dictionary.com › browse › irrationalityIRRATIONALITY Definition & Meaning | Dictionary.com

    Irrationality definition: the quality or condition of being irrational. . See examples of IRRATIONALITY used in a sentence.

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  5. www.merriam-webster.com › dictionary › irrationalIrrational Definition & Meaning - Merriam-Webster

    Irrational can mean not rational, not governed by reason, or being an irrational number. Learn the synonyms, examples, word history, and usage of irrational in different contexts.

  6. en.wikipedia.org › wiki › IrrationalityIrrationality - Wikipedia

    Irrationality is cognition, thinking, talking, or acting without rationality. Irrationality often has a negative connotation, as thinking and actions that are less useful or more illogical than other more rational alternatives.

  7. dictionary.cambridge.org › us › dictionaryIRRATIONALITY definition | Cambridge English Dictionary

    the fact of not using reason or clear thinking: The play is a tragicomedy about the terrifying irrationality of love. The apparent irrationality of the markets ' reactions is completely understandable. See. irrational. Fewer examples. Her book is called ' Office irrationality: Completely ridiculous things we do at work '.

  8. www.vocabulary.com › dictionary › irrationalityIrrationality - Definition, Meaning & Synonyms | Vocabulary.com

    3 days ago · irrationality. Other forms: irrationalities. Definitions of irrationality. noun. the state of being irrational; lacking powers of understanding. synonyms: unreason. see more.

  9. www.oxfordlearnersdictionaries.com › english › irrationalityirrationality noun - Definition, pictures, pronunciation and...

    irrationality is the fact of not being based on, or not using, clear logical thought. See examples, pronunciation, synonyms and usage notes for this word.