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Definition of union

union

/ˈjuːnjən/
Plural:unions
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union Lexical Profile

union Game Scores & Validity

• noun

1

The action or fact of joining together or being joined together, especially into a single political or unified entity.

Example

"The treaty formalized the union between the two neighboring countries, creating a powerful new republic."


2

An organized association of workers formed to protect and further their rights, interests, and working conditions.

Example

"The factory workers voted to form a union to negotiate better wages and safer working hours."


3

A mathematical set containing all the distinct elements that are present in two or more given sets.

Example

"In set theory, the union of set A and set B includes all the numbers found in either individual set."

Synonyms
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Antonyms
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• Rhymes for union

Word Origin & Etymology

From Old French 'union', from Late Latin 'unionem' (nominative 'unio'), meaning 'oneness, unity, a uniting', derived from the Latin word 'unus' meaning 'one'.

Cite this Entry


Wordmom. (2026). Definition of Union. In Wordmom Dictionary. Retrieved Oct 12, 2026, from https://wordmom.com/dictionary/union
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