1.a way of emphasizing that sth. is true and that there is no doubt about it 肯定，没问题
例1：Some parents think that children need to educate strictly, others most definitely do not.
例2：Do you like rose I sent to you？ Definitely!
2.In a way that is certain or that shows that you are certain 确切地，明确地
例1：The date of holiday has not been definitely decided.
例2：You must say definitely whether you broken the vase.
You bet! 一定!
It sounds good!这听起来很棒
Absolutely. / Exactly. 的确是!
No doubt about it. 可不是嘛!
Anything you say! 你说的都对!
That’s good point. 你说的有道理!
I agree with you. 我同意你的观点。
You are right!(我认为)你是正确的!
We can see eye to eye. 我们看法一致。
You can say that again. 我也有同样的感觉。
I can't agree with you anymore. 我十分同意。
I would go along with you on that. 我赞同你的观点。
I speak the same language with you! 我跟你意见一致。
① certainly adv. 当然，必定
Eg. Can I borrow your rule？ Certainly!
② surely adv. 当然，无疑
Eg. I certainly remember our wedding anniversary.
③ absolutely adv. 绝对地，完全地
Eg：She absolutely is the winner of the first prize.
⑤ definitely adv. 明确地，当然，肯定地
Eg：Today her speech is successful. Definitely!
A kindergarten teacher is trying to explain to her class the definition of the word “definitely.”
To make sure the students have a good understanding of the word, she asks them to use it in a sentence.
The first student raises his hand and says, “The sky is definitely blue.” The teacher says, “Well, that isn’t entirely correct, because sometimes it’s gray and cloudy.”
Another student says, “Grass is definitely green.” The teacher again replies, “If grass doesn’t get enough water it turns brown, so that isn’t really correct either.”
A third student asks, “Do farts have lumps？” The teacher looks at him and says, “No. But that isn’t really a question you want to ask in class discussion.” So the student replies. “Then I definitely shit my pants.”