Can you give me a definite answer by tomorrow?

你最晚明天能给我一个确定的答复吗？

《牛津词典》

It's too soon to give a definite answer.

现在给予明确答复还为时尚早。

《柯林斯英汉双解大词典》

She considers that it is too early to form a definite conclusion.

她认为现在下确切的结论还为时过早。

《牛津词典》

and insanity incites to action. With no definite plan and acting like a madman, Murlock ran quickly to the wall.

VOA: special.2009.10.31

Genesis 1 states that God created the adam, with the definite article: This is not a proper name.

创世纪》第一章中说上帝创造了那个人，前面有定冠词：,这并不是一个确切的名字。

耶鲁公开课 - 旧约导论课程节选

Well, I mean the definite article "the", you use when there's only a single specific item that you're talking about.

当你谈论一个特定的项目时，就用定冠词“the” 。

经常犯的失误 - SpeakingMax英语口语达人

It is a definite basis for a kind of world attainable in our own time and generation.

FORBES: State of the Union 2013

They will have a definite sweetness, a deep roasted flavor, and a texture that's just this side of mushy.

WSJ: Momofuku Recipes by David Chang

But in one, a formation known as Cobrahead, on the Aristarchus Plateau at the edge of the Ocean of Storms, Clementine's cameras saw a definite reddening of a sinuous feature called a rille.

ECONOMIST: A transient success