definite [ˈdefɪnət] 美 [ˈdɛfənɪt] adj. 明确的; 一定的; 肯定; 有把握;
definitely adv. 明确地; 确切地; 一定地; 肯定地; int. （表强烈的肯定）当然;
definitely not 绝不；决不;
definite article n. 定冠词;
反义词是：indefinite
1. definite that从句，如：
It’s definite that……确信……；肯定……，
相当于：Sb be sure to do sth.
Is it definite that he's leaving?
他肯定要离开吗？
=Is he sure to leave?
It's definite that he'll come.= He is sure to come.
他肯定会来。
It's definite that he will win.
他肯定会赢。
2.be definite about sth. 某人对……毫无疑问
I'm definite about this.
我对这事毫无疑问。
Mary is very definite about this.
玛丽对此非常肯定。
She was very definite about having seen him.
她见过他，这一点她很肯定。
3. definite views about…… 对……有明确的观点
Her Royal Highness has definite views about most things .
女王陛下对大多数事情都有明确的观点。
4. definite 名词，表示“明确的、确定的、明显的、无疑的、定形的、有把握的”如：
They must have a definite replay, yes or no.
他们必须得到一个要么是要么非的明确回答。
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？
There was a definite feeling that things were getting worse.
人们明显感到事情越来越糟。
It's too soon to give a definite answer.
要给出一个明确的答复，现在还为时过早。
We didn't have any definite proof...
我们没有任何确实的证据。
There has already been a definite improvement.
已经有了显著的改进。
She made no definite plans for her future.
她对未来没有确定的计划。
If you have any definite news of my husband, please let me know .
如果有我丈夫的确切消息，请一定告诉我。
That's a very definite possibility.
那是很有可能的。
When you came away you made a definite effort to mix.
你离开时一定要努力和大家搞好关系。
You must give a definite answer to the question. There's no getting round it.
你必须明确回答这个问题，想绕是绕不过去的。
In a double-blind trial, there were definite improvements.
在双盲试验中，改善效果明显。
Now what we need is definite proof that we can lay before the prime minister.
如今，我们需要的是可呈交给首相的确凿证据。
Let's feel out the situation first before we take any definite steps.
我们先把情况摸清楚，再采取具体措施。
The plan has not yet taken definite form.
该计划尚未定形。
He hummed and hawed, giving no definite reply.
他闪烁其词，不做肯定答复。
I demanded a definite answer.
我要求一个明确的答复。
It is necessary to fix a definite date for the submission of your paper.
有必要为你的论文提交定一个确切的日期。
I wish that you could give me a definite answer to my application as soon as possible.
我希望你们对我的应聘能够尽早给一个确切的答复。
I want an appointment for a definite time and place.
我要一个有确定时间和地点的约会。
5.作名词： 肯定的事（或人）
‘We're moving our office to Glasgow.’ ‘That's a definite, is it?’
“我们的办事处要搬到格拉斯哥去。”“这事儿定了，是吗？”
‘Is Sarah coming to the party?’ ‘Yes, she's a definite.’
“萨拉要来参加聚会吗？”“是的，她肯定来。”
