n.

1. 結合；合併[U][S]；合而為一
   We are working for the union of the two countries.

   我們正為這兩國的合併而努力。

2. 和諧；一致[U]
   All the nationalities live together in perfect union.

   各族人民非常和睦地生活在一起。

3. 聯邦，聯盟[C]
4. 工會；聯合會，協會[C][G]
   He was compelled to join the union as a condition of getting the job.

   作為獲得該工作的先決條件，他被迫加入了工會。

5. （大寫）美國；英國[the S]
   My paramount object is to save the Union and destroy slavery.

   我的最高目標是拯救美國，摧毀奴隸制度。

6. 結合；結婚[C][U]
   They married in 1950 but it was not a happy union.

   他們於1950年結婚，但這一結合並不美滿。

7. （常大寫，用於名稱中）（大學的）學生自治會，會社，社團[C][G]

n.

1. the action or fact of uniting or being united.
   ▸a state of harmony or agreement.
   ▸a marriage.
   ▸ (the Union) the uniting of the English and Scottish crowns in 1603, of the English and Scottish parliaments in 1707, or of the parliaments of Great Britain and Ireland in 1801.
2. a society or association formed by people with a common interest or purpose, especially a trade union.
3. (also Union) a political unit consisting of a number of states or provinces with the same central government, especially the US.
   ▸ (the Union) the northern states of the US in the American Civil War.
4. Mathematics  the set that comprises all the elements (and no others) contained in any of two or more given sets.
5. a joint or coupling for pipes.
6. a part of a flag with an emblem symbolizing national union, normally in the upper corner next to the staff.
7. a fabric made of different yarns, typically cotton and linen or silk.
8. Brit. historical a number of parishes consolidated for administering the Poor Laws.