define的名词形式为definition。define作为动词，中文含义有解释的含义、阐明、界定、描出…的外形、确定…的界线等；而definition作为define的名词形式，含义有释义、定义、清晰度。
一、define的基本含义及用法介绍
define作为动词，意为解释(词语)的含义;给(词语)下定义;阐明;明确;界定;画出…的线条;描出…的外形;确定…的界线。
例句：The term ‘mental illness’ is difficult to define.
“精神病”这个词很难下定义。
We need to define the task ahead very clearly.
我们需要明确今后的任务。
The mountain was sharply defined against the sky.
那座山在天空的衬托下显得轮廓分明。
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。
Life imprisonment is defined as 60 years under state law.
按照州法律终身监禁定义为60年。
We need to define the task ahead very clearly.
我们需要明确今后的任务。
二、definition的基本含义及双语例句
definition作为名词，意为释义，解释;定义;清晰度。
例句：What's your definition of happiness?
你对幸福的定义是什么？
The definition of the digital TV pictures is excellent.
数字电视图像的清晰度很高。
We need to look at a more expansive definition of the term.
我们需要考虑这个词所包含的更广泛意义。
There is no generally accepted definition of life
关于生活的定义不一而足。
It all depends on your definition of punk, doesn't it?
“这全视乎你对朋克摇滚乐的定义，不是吗？”
