rational

có lý trí, duy lý

1. Capable of reasoning.Có khả năng suy luận.
2. Behaving according to some partial order of preferences.Hành động theo một thứ tự ưu tiên bộ phận giữa các lựa chọn.
3. Logically sound; not self-contradictory or otherwise absurd.
4. Healthy or balanced intellectually; exhibiting reasonableness.
5. Of a number, capable of being expressed as the ratio of two integers.

• Man is a rational creature.
• His statements were quite rational.
• ¾ is a rational number, but √2 is an irrational number.