irrational

英 [ɪ'ræʃ(ə)n(ə)l] 美[ɪ'ræʃənl]

• adj. 不合理的；无理性的；荒谬的
• n. [数] 无理数

1. not consistent with or using reason;

"irrational fears"

"irrational animals"

2. real but not expressible as the quotient of two integers;

"irrational numbers"