1. (noun)union, labor union, trade union, trades union, brotherhood an organization of employees formed to bargain with the employer "you have to join the union in order to get a job"
2. (noun)Union, North the United States (especially the northern states during the American Civil War) "he has visited every state in the Union"; "Lee hoped to detach Maryland from the Union"; "the North's superior resources turned the scale"
3. (noun)coupling, mating, pairing, conjugation, union, sexual union the act of pairing a male and female for reproductive purposes "the casual couplings of adolescents"; "the mating of some species occurs only in the spring"
4. (noun)union, unification the state of being joined or united or linked "there is strength in union"
5. (noun)marriage, matrimony, union, spousal relationship, wedlock the state of being a married couple voluntarily joined for life (or until divorce) "a long and happy marriage"; "God bless this union"
6. (noun)union, conglutination healingprocess involving the growing together of the edges of a wound or the growing together of broken bones
7. (noun)union a political unit formed from previously independent people or organizations "the Soviet Union"
8. (noun)union, sum, join a set containing all and only the members of two or moregiven sets "let C be the union of the sets A and B"
9. (noun)union the occurrence of a uniting of separate parts "lightning produced an unusual union of the metals"
10. (noun)union a device on a nationalflag emblematic of the union of two or more sovereignties (typically in the upper inner corner)
11. (adj)union, unification, uniting, conjugation, jointure the act of making or becoming a single unit "the union of opposing factions"; "he looked forward to the unification of his family for the holidays"
12. (adj)Union, Federal being of or having to do with the northern United States and those loyal to the Union during the American Civil War "Union soldiers"; "Federal forces"; "a Federal infantryman"
13. (adj)union of trade unions "the union movement"; "union negotiations"; "a union-shop clause in the contract"
Definitions of 'Union'
Webster 1913 Dictionary
1. (noun)Union the act of uniting or joining two or morethings into one, or the state of being united or joined; junction; coalition; combination
2. (noun)Union agreement and conjunction of mind, spirit, will, affections, or the like; harmony; concord
3. (noun)Union that which is united, or made one; something formed by a combination or coalition of parts or members; a confederation; a consolidated body; a league; as, the weavers have formed a union; trades unions have become very numerous; the United States of America are often called the Union
4. (noun)Union a textilefabric composed of two or more materials, as cotton, silk, wool, etc., woven together
6. (noun)Union a device emblematic of union, used on a national flag or ensign, sometimes, as in the military standard of Great Britain, covering the whole field; sometimes, as in the flag of the United States, and the English naval and marine flag, occupying the upper inner corner, the rest of the flagbeing called the fly. Also, a flag having such a device; especially, the flag of Great Britain
7. (noun)Union a joint or other connection unitingparts of machinery, or the like, as the elastic pipe of a tender connecting it with the feed pipe of a locomotive engine; especially, a pipefitting for connecting pipes, or pipes and fittings, in such a way as to facilitate disconnection
8. (noun)Union a cask suspended on trunnions, in which fermentation is carried on
Definition of Union 
