meaning of union

1. The act of uniting or joining two or more things into one, or the state of being united or joined; junction; coalition; combination.
2. Agreement and conjunction of mind, spirit, will, affections, or the like; harmony; concord.
3. 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. A textile fabric composed of two or more materials, as cotton, silk, wool, etc. , woven together.
5. A large, fine pearl.
6. 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 flag being called the fly. Also, a flag having such a device; especially, the flag of Great Britain.
7. A joint or other connection uniting parts of machinery, or the like, as the elastic pipe of a tender connecting it with the feed pipe of a locomotive engine; especially, a pipe fitting for connecting pipes, or pipes and fittings, in such a way as to facilitate disconnection.
8. A cask suspended on trunnions, in which fermentation is carried on.
9. union 1. theory> An operation on two sets which returns the set of all elements that are a member of either or both of the argument sets; normally written as an infix upper-case U symbol. The operator generalises to zero or more sets by taking the union of the current partial result initially the empty set with the next argument set, in any order. For example, a, b, c U c, d, e = a, b, c, d, e 2. A type whose values may be of one of a number of other types, thet current type depending on conditions that are only known at run-time. A variable of union type must be allocated sufficient storage space to hold the largest component type. Some unions include extra information to say which type of value the union currently has a "tagged union", others rely on the program to keep track of this independently. A union contrasts with a structure or record which stores values of all component types at once. 3. An SQL operator that concatenates two result sets, that must have the same number and types of columns. The operator may be followed by the word "ALL" to indicate that results that appear in both sets should appear twice in the output.
10. 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"

Related Words

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