an agreement between countries, companies, etc. to work together in order to achieve sth that they all want （国家、公司等的）联盟，结盟，同盟◆The two companies formed an alliance to improve shipping and distribution networks. 两家公司结盟以改进航运和经销网络。◆The proposed alliance between the two airlines has been widely criticized. 两家航空公司的结盟建议受到广泛批评。◆The training department runs the course, in alliance with the university. 培训部与大学联合开设这课程。⨁to enter into / form / make an alliance 达成／形成／缔结同盟
a group of countries, companies, etc. who work together in order to achieve sth that they all want 联盟；结盟团体◆There are eight members of the alliance. 联盟共有八个成员。◆The organization is a broad alliance of many different groups. 这组织是由多个不同群体组成的广泛联盟。