"union" in the noun sense
1. 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. 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. 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. union, unification
the state of being joined or united or linked
"there is strength in union"
5. 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. union, conglutination
healing process involving the growing together of the edges of a wound or the growing together of broken bones
a political unit formed from previously independent people or organizations
"the Soviet Union"
8. union, sum, join
a set containing all and only the members of two or more given sets
"let C be the union of the sets A and B"
the occurrence of a uniting of separate parts
"lightning produced an unusual union of the metals"
a device on a national flag emblematic of the union of two or more sovereignties (typically in the upper inner corner)
11. 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"
"union" in the adjective sense
1. Union, Federal
being of or having to do with the northern United States and those loyal to the Union during the American Civil War
"a Federal infantryman"
of trade unions
"the union movement"
"a union-shop clause in the contract"
Source: WordNet® (An amazing lexical database of English)
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