Pertaining to reason.

理性的；推理的。

Having the power to reason, or think connectedly.

有理性；有推理能力的。

Exercising, agreeable to, or in accord with, reason; intelligent; not foolish.

应用理智的；合理的；明理的；明智的。

Designating a number or quantity that cav be expressed without radical signs.

【数】有理的。