/ˈju:niən ||; ˈjunjən/noun1 [U] [sing] the action of joining or the situation of being joined 结合；联合；合并
2 [C] a group of states or countries that have joined together to form one country or group 联邦；联盟: the European Union 欧洲联盟
3 =TRADE UNION
4 [C] an organization for a particular group of people 联合会；协会: the Athletics Union 田径联合会