英汉词典

1. 阐明;规定;限定;使明确
    If you define something, you show, describe, or state clearly what it is and what its limits are, or what it is like.

define的翻译

    e.g. We were unable to define what exactly was wrong with him...
           我们说不清楚他到底哪里不对劲。
    e.g. He was asked to define his concept of cool.
           他被要求说明自己关于“酷”的定义。