1.peace的基本意思是“和平”“和平时期”,也可表示“治安”“社会安定”,当指人的心情或抽象事物时,还可表示“安心”“平静”“安静”。
2.peace是不可数名词,常用于单数形式,有形容词修饰时,前面可加不定冠词,表示“一种或一段时间的和平”。

at peace
1.处于和平状态 in a state of friendship or harmony (with oneself/sb/sth)
The two countries were at peace.两国现在和平相处。
2.处于平静的状态 at the freedom from anxiety or troubling thoughts
She felt at peace, happy, restored to affection.又回到了爱之中,她感到宁静、幸福。
The problem was settled and his mind was at peace.问题解决了,他的心绪宁静了。
3.故去,死去 dead
The old lady is at peace now.这位老太太故去了。


in peace
平安地,安静地 at the freedom from unwanted noise or troubling thoughts
He died in peace.他平静地死去。
Never relax your vigilance while you live in peace.你们要居安思危。
May his soul rest in peace!愿他的灵魂安息吧!


make (one's) peace with
同…讲和 stop a quarrel with sb
He repaired the fence he had broken and made his peace with the neighbour on whose property it stood.他把邻居地上被他弄坏的篱笆修好,和邻居讲和。

The people desire peace, security and happiness.人民向往和平、安全、幸福。
Let's maintain peace in the world.让我们来维持世界和平吧。
I hope peace will come to stay.我希望和平能持久。
People are eager to seek peace.人民渴望寻求和平。
We are now working for world peace.我们正在为实现世界和平而工作。
The dove is looked upon as the symbol of peace.鸽子被看成是和平的象征。
People hate those who unwittingly harm the cause of peace.人们痛恨那些在不知不觉中危害和平事业的人。
The country has always pursued a policy of peace.该国一直奉行和平政策。
After a brief peace, war broke out again.在短暂的和平之后,战争又爆发了。
She had a silver peace symbol hanging on a chain around her neck.她有一个银制的和平标志挂在项链上。
The job of the police is to keep the peace.警察的任务是维护治安。
The youths were arrested for a breach of public peace.那些年轻人因破坏社会治安而被捕。
I would work better if I had a bit of peace and quiet.要是再静一些我能工作得更好。

at peace, in peace
这两个短语的区别是：at peace的意思是“处于和平〔平静〕状态”,用如形容词,在句中多作表语; 而in peace则是“平静”“安谧”的意思,用如副词,在句中多作状语。例如:
The two nations are now at peace.两国现已停战。
We live together in peace.我们和睦相处。
下面两个短语意思不同:
keep peace
保持和平
keep the peace
守法,维护治安

［同义词］   treaty, calm, peacefulness, quiet, serenity, tranquility
［词源］  ＜中古英语pais (和平)