签定的英文：
sign (a contract, treaty, etc.)

参考例句：

Hostilities ended with the conclusion of a peace treaty.
和平条约签定以后，战事随之结束。

Peace/A Peace was signed between the two countries.
两国签定了和约.

The time is up on the contract we signed with them.
我们与他们签定的合约到期了。

The signing of the agreement was a prologue to better relations between the two countries.
签定这一协议是两国关系加强的序幕。

At the same time, he made a secret pact with the sung in the southern part of China
与此同时，他与中国南宋秘密签定了协议。

General Superintendence & Co, Geneva (S.G.S)
瑞士日内瓦通用签定后司

Since the agency agreement was signed, your turnover has amounted to $500.
自从代理协议签定以后，你们的销售额已达500美圆。

sign是什么意思：
n. 迹象；预兆；记号，符号；手势；信号，暗号
v. 签名，签署；示意；打手势；用信号表示

This is a superscript sign.
这是个标在上方的符号。

This is a hopeful sign.
这是一个乐观的信号。

Scorpio is an Autumn Zodiac Sign（ as are the Signs of Libra and Sagittarius）。
天蝎：黄道十二宫的第八宫，每年10月23日前后太阳到这一宫。

contract是什么意思：
n. 契约；合同；婚约
v. 感染；（使）缩小，缩短，收缩；订契约

The contract was negotiated.
合约已谈妥。

confidentiality of contracts
合同的保密性

Renewal of contract
合同的续订

treaty是什么意思：
n. 条约，协议；谈判

They negotiated a treaty.
他们商订了一项条约。

The government denounced the treaty.
政府通知废止该项条约。

They met to finalise the terms of the treaty.
他们会晤确定条约的条款。