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    irrational
    /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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