union

1.[c]工会an organization of workers, usually in a particular industry, that exists to protect their interests, improve conditions of work, etc.

I've joined the union .我已经加入工会。

a union member工会会员

2.[c]协会；联合会；会社；俱乐部an association or a club for people or organizations with the same interest

the Scottish Rugby Union苏格兰橄榄球协会

3.[c]同盟；联盟；联邦a group of states or countries that have the same central government or that agree to work together

the former Soviet Union前苏维埃联邦

the European Union欧洲联盟

4.[sing]（尤指内战时期的）美利坚合众国，美国the US (used especially at the time of the Civil War)

the Union and the Confederacy合众国与南部邦联

the State of the Union address by the President美国总统向国会发表的国情咨文

5.[u][sing]联合；结合；合并the act of joining two or more things together; the state of being joined together; the act of two people joining together

a summit to discuss economic and monetary union商讨经济和货币联盟的高峰会议

Northern Ireland's union with Britain北爱尔兰同英国的联合

sexual union性结合

6.[c]结为夫妻；婚姻a marriage

Their union was blessed with six children.他们婚后幸得六个儿女。