irrationalKK [ˏɪˋræʃənəl] /ˌɪˈɹæʃənəl/發音形容詞1不理性的、非理性的Fear can make even smart people behave in irrational ways.恐懼會讓聰明的人也做出不理性的行為。2不合理的、毫無道理的、荒謬的She has an irrational fear of riding in elevators alone.她對獨自搭電梯有種毫無道理的恐懼。3無理的數學The square root of two is an irrational number.二的平方根是一個無理數。名詞1無理數數學Between any two fractions you can always find an irrational.在任意兩個分數之間,都一定能找到一個無理數。