# union

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## Union,

industrial township (1990 pop. 50,024), Union co., NE N.J.; settled 1749 by colonists from Connecticut, set off from Elizabethtown 1808. Steel and metal products and paint are among its various manufactures. Union was the site of a Revolutionary battle in 1780. It is the seat of Kean Univ. of New Jersey.

## Union

a political unit formed by joining monarchical states under the crown of one sovereign.

In state law, two types of union are distinguished—personal and organic. A personal union may arise whenever, as a result of dynastic ties and the order of succession, one person becomes the monarch of two or more states; in this way, for example, England and Hanover were joined in a union from 1714 to 1837. States joined in a personal union retain their own sovereignty, and the power of the monarch is nominal.

An organic union may be formed on the basis of a treaty, as in the case of the union of Sweden and Norway from 1814 to 1905, or it may be imposed by a stronger state on a weaker one, as in the case of the union of Austria and Hungary from 1867 to 1918 or the union of Denmark and Iceland from 1918 to 1944. In international relations, an organic union acts as a single sovereign state.

## union

[′yün·yən]
(computer science)
A data structure that can store items of different types, but can store only one item at a time.
(design engineering)
A screwed or flanged pipe coupling usually in the form of a ring fitting around the outside of the joint.
(mathematics)
A union of a given family of sets is a set consisting of those elements that are members of at least one set in the family. Also known as join.
For two fuzzy sets A and B, the fuzzy set whose membership function has a value at any element x that is the maximum of the values of the membership functions of A and B at x.
The union of two Boolean matrices A and B, with the same number of rows and columns, is the Boolean matrix whose element cij in row i and column j is the union of corresponding elements aij in A and bij in B.
The union of two graphs is the graph whose set of vertices is the union of the sets of vertices of the two graphs, and whose set of edges is the union of the sets of edges of the two graphs.

## union

union
A pipe fitting, 1 used to connect the ends of two pipes, neither of which can be turned; consists of three pieces, the two end pieces (having inner threads), which are tightened around the pipe ends to be joined, and a center piece, which draws the two end pieces together as it is rotated, effecting a seal. Also see flange union.

## union

1. an association, alliance, or confederation of individuals or groups for a common purpose, esp political
2. a device on a flag representing union, such as another flag depicted in the top left corner
3. a device for coupling or linking parts, such as pipes
4.
a. an association of students at a university or college formed to look after the students' interests, provide facilities for recreation, etc.
b. the building or buildings housing the facilities of such an organization
5. Maths a set containing all members of two given sets. Symbol: ∪, as in A∪B
6. in 19th-century England
a. a number of parishes united for the administration of poor relief
b. a workhouse supported by such a combination
7. Textiles a piece of cloth or fabric consisting of two different kinds of yarn

## Union

the
1. Brit
a. the union of England and Wales from 1543
b. the union of the English and Scottish crowns (1603--1707)
c. the union of England and Scotland from 1707
d. the political union of Great Britain and Ireland (1801--1920)
e. the union of Great Britain and Northern Ireland from 1920
2. US
a. the United States of America
b. the northern states of the US during the Civil War
c. (as modifier): Union supporters

## union

(set 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)

## union

(programming)
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.

## union

(database)
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.

## union

The joining of two files in a relational database. See set theory.
References in periodicals archive ?
The union official recalled: "We looked at [the negotiator] and said, 'Why do we have to do that?
Still, by not making an immediate decision on a successor, Regalado said it leaves the union in a quandary.
The State Department declined repeated offers to comment on any questions relating to the raid and how it perceived the IFTU's role in an independent Iraq; nevertheless, it seems clear that the CPA didn't exactly consider the union a partner.
Tours of a local unionized company combined with a presentation by the management team and the union leadership will expose students to an area's work site as well as a variety of issues typically included in a Principles of Management course.
Pegler used Scalise's case to call for new restrictions on labor unions, but also to highlight the growing problem of organized crime's influence in the union movement, a phenomenon seen at the time as a recent development.
First Nations' member or related organization that is a member or is part of the community that is a member of the Union of Ontario Indians is permitted to be part of the credit union.
Workers who are interested in joining the union can read messages from workers who do the same kind of work about how having a union has helped them make improvements on the job, solve problems, and have a voice with their employers in how care is provided at their workplace.
Expect the union to approach federal, state and local government agencies to challenge your compliance with regulations, licensure and accreditation.
1] A National Labor Relations Board ruling in October sustained the union membership of 200 attending physicians at Metropolitan Hospital in New York.
But not everyone who lived in a Northern state was loyal to the Union cause.
Even the net gain is deceptive because the union members leaving through plant closings and downsizings are not being replaced by members holding comparable jobs.
But I think it also represents the union movement of the twenty-first century's economy.

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