[] () secret agreement especially in order to do sth dishonest or harmful 密谋；串通；勾结◆The airline suspects collusion between insurance companies in setting the new rates. 在制订新费率时，航空公司涉嫌与保险公司相互勾结。▸collusive /kəˈluːsɪv/
adjective
◆a collusive agreement to reduce production 降低生产的合谋协议