an agreement to say nothing about an issue that should be generally known保持缄默协定；攻守同盟
柯林斯高阶英汉双解学习词典释义
N-VAR
密谋;阴谋
Conspiracy is the secret planning by a group of people to do something illegal.
例句
Seven men, all from Bristol, admitted conspiracy to commit arson...7个人都来自布里斯托尔，他们承认了合谋纵火。He believes there probably was a conspiracy to kill President Kennedy in 1963.他认为1963年肯尼迪总统遇刺身亡可能是一个阴谋。
N-COUNT
阴谋
A conspiracy is an agreement between a group of people which other people think is wrong or is likely to be harmful.
例句
It's all part of a conspiracy to dispense with the town centre all together and move everything out to Meadowhall...彻底抛开市中心而把所有东西都搬到梅多霍尔购物中心，这完全是一场阴谋的一部分。There was no evidence to link the brigade to any conspiracy against Mr Bush.没有证据表明这帮人对布什先生图谋不轨。
PHRASE
（为了私利）保持缄默的密约
If there is a conspiracy of silence about something, people who know about it have agreed that they will not talk publicly about it, although it would probably be a good thing if people in general knew about it.
例句
Detectives have run into a conspiracy of silence in the tight-knit communities of the peninsula.侦探们犯了难，半岛上各个群体抱成一团，达成了保持缄默的密约。
英汉词典释义
n.
阴谋, 密谋，策划
The men were found guilty of conspiracy to murder.这些人被裁决犯有阴谋杀人罪。
英英词典释义
Noun
1. a secret agreement between two or more people to perform an unlawful act
2. a plot to carry out some harmful or illegal act (especially a political plot)
3. a group of conspirators banded together to achieve some harmful or illegal purpose