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1. Oxford American Dictionary

   irrational

   • IPA[i(r)ˈraSH(ə)nəl]

   美式

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

   adj.

   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 nonrecurring expansion when expressed as a decimal. Examples of irrational numbers are the number π and the square root of 2.

   n.

   名詞

   • 1. an irrational number.
3. • 更多解釋

   irrational

   • IPA[ɪˈraʃən(ə)l]

   英式

   • adj.
     not logical or reasonable: irrational feelings of hostility
   • n.
     an irrational number or quantity; a surd.

   Oxford Dictionary