Collins English-English Dictionary

union ['juːnjən]

1. 1. n the condition of being united, the act of uniting, or a conjunction formed by such an act

2. 2. n [maths] join a set containing all members of two given sets. Symbol: , as in AB

3. 3. n an association, alliance, or confederation of individuals or groups for a common purpose, esp political

4. 4. n agreement or harmony

5. 5. n short for trade union

6. 6. n the act or state of marriage or sexual intercourse

7. 7. n a device on a flag representing union, such as another flag depicted in the top left corner

8. 8. n a device for coupling or linking parts, such as pipes

9. 9. n [often capital] an association of students at a university or college formed to look after the students' interests, provide facilities for recreation, etc

10. 10. n the building or buildings housing the facilities of such an organization

11. 11. n a number of parishes united for the administration of poor relief

12. 12. n a workhouse supported by such a combination

13. 13. n [textiles] a piece of cloth or fabric consisting of two different kinds of yarn

14. 14. n [modifier] of or related to a union, esp a trade union

15. 15. n [Etymology] C15: from Church Latin unio oneness, from Latin unus one