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  1. Oxford Dictionary

    irrational

    • IPA[ɪˈraʃən(ə)l]

    英式

    • adj.
      not logical or reasonable；not endowed with the power of reason.
    • n.
      an irrational number or quantity; a surd.
    • 釋義

    形容詞

    • 1. not logical or reasonable irrational feelings of hostility
    • ▪ not endowed with the power of reason.
    • 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.

    名詞

    • 1. an irrational number or quantity; a surd.