What's your definition of happiness?

你对幸福的定义是什么？

《牛津词典》

There is no generally accepted definition of life.

没有一个对生活的普遍公认的定义。

《柯林斯英汉双解大词典》

Can you give a more precise definition of the word?

你能给这个词下个更确切的定义吗？

《牛津词典》

To many people,the ability of a cell to reproduce itself is the definition of life itself.

VOA: special.2010.07.20

Literature is many things, a many-splendored thing," you say to yourself, "and it simply cannot be confined or trapped within a definition of that kind."

文学可以是很多，很多奇妙的东西，它不会局限于,那种定义“

耶鲁公开课 - 文学理论导论课程节选

I think you may have defined it already, but I couldn't find a definition of strictly in the book we have.

我想你之前已经定义过了,但是我在课本里没有找到,“严格”的定义

耶鲁公开课 - 博弈论课程节选

That doesn't mean we should change the definition of marriage, which is between a man and a woman.

BBC: Budget 2013: No tax break for married couples

After we get done with it, there will hopefully be a new definition of low-cost.

FORBES: Magazine Article

Create a uniform definition of child at under age 19 and eliminate the student exception.

FORBES: Navigating The Maze Of Child Tax Credits