union

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union^¹

/ˈjuː.njən/
/ˈjuː.ni.ən/

Rhymes with -uːnjən

Where it comes from

From Middle English unyoun, from Old French union, from Late Latin ūniō, ūniōnem (“oneness, unity”), from Latin ūnus (“one”). Doublet of unio.

noun unions

countable The act of uniting or joining two or more things into one.
Similar: junction, coalition, combination · Opposite: nonunion, disunion
uncountable The state of being united or joined; a state of unity or harmony.
Opposite: nonunion, disunion
countable Something united, or made one; something formed by a combination or coalition of parts or members; a confederation; a consolidated body; a league.
countable A trade union; a workers' union. In the autumn there was a row at some cement works about the unskilled labour men. A union had just been started for them and all but a few joined. One of these blacklegs was laid for by a picket and knocked out of time.
countable An association of students at a university for social and/or political purposes; also in some cases a debating body.
countable A joint or other connection uniting parts of machinery, such as pipes.
countable The set containing all of the elements of two or more sets.
countable The act or state of marriage.
archaic, euphemistic, uncountable Sexual intercourse.
countable A data structure that can store any of various types of item, but only one at a time. Unions are useful in those cases where you need to keep track of a value that can be represented as different data types during the lifetime of the program.
archaic, countable A large, high-quality pearl. Nonius the senator hath a purple coat as stiff with jewels as his mind is full of vices; rings on his fingers worth 20,000 sesterces, and[…]an union in his ear worth an hundred pounds' weight of gold […]
countable, historical, uncountable An affiliation of several parishes for joint support and management of their poor; also the jointly-owned workhouse.

verb unions · unioning · unioned

To combine sets using the union operation.

adjective more union · most union

Belonging to, represented by, or otherwise pertaining to a labour union. Actors have to be union to get work here.
Similar: unionized · Opposite: nonunion
India federal. The union government of India

Union^²

/ˈjuː.njən/

Where it comes from

(locomotive): Derived from the name of the only U.S. company to use that configuration.

noun Unions

The 0-10-2 locomotive wheel arrangement.
The canton of the United States flag: the portion of the flag containing stars on a blue background.

proper noun

US, dated, especially, obsolete, with determiner The United States of America. threats to secede from the Union
US, historical, with determiner Those of the United States that did not secede at the time of the Civil War (of the United States of America). Union troops at Gettysburg
historical, with determiner The Soviet Union: the proper noun Union is the standard English translation of the proper noun Союз (Sojuz), and All-Union is the standard English translation of всесоюзный (vsesojuznyj). throughout the Union, but nowhere more so than at the Center [Moscow]
India, alternative, with determiner Alternative form of union
A community in Central Elgin municipality, Elgin County, Ontario, Canada.
A barangay of Ubay, Bohol, Philippines.
A village on the south cast of the island of Siargao, Surigao del Norte, Philippines.
A town in Greene County, Alabama.
A ghost town in Merced County, California.
A former unincorporated community in Napa County, California.
A small town in Tolland County, Connecticut.
A village in McHenry County, Illinois.
An unincorporated community in Clay Township, Pike County, Indiana.
A tiny city in Hardin County, Iowa.
A home rule city in Boone County, Kentucky.
A town in Knox County, Maine.
A town in Neshoba County and Newton County, Mississippi.
A city, the county seat of Franklin County, Missouri.
An unincorporated community in Clark County, Missouri.
A village in Cass County, Nebraska.
A village and census-designated place in the town of Wakefield, Carroll County, New Hampshire.
A township in Hunterdon County, New Jersey.
A township and census-designated place therein, in Union County, New Jersey.
A hamlet in Madison County, New York.
A large town in Broome County, New York.
A city in Montgomery County and Miami County, Ohio.
A city in Union County, Oregon.
A city, the county seat of Union County, South Carolina.
An unincorporated community in Floyd County, Virginia.
A small town, the county seat of Monroe County, West Virginia.
A small town in Burnett County, Wisconsin.
A small town in Door County, Wisconsin.
A town and unincorporated community in Eau Claire County, Wisconsin.
An unincorporated community in the town of Lima, Grant County, Wisconsin.
A small town in Pierce County, Wisconsin.
A town and unincorporated community in Rock County, Wisconsin.
A small town in Vernon County, Wisconsin.
A small town in Waupaca County, Wisconsin.
A large number of other townships in the United States, listed under Union Township.

Union^³

/ˈjuː.njən/

Where it comes from

Probably a variant spelling of Onion.

proper noun Unions

A surname.

Union^⁴

/ˈjuː.njən/

Where it comes from

Clipping of Oxford Union.

proper noun the Union

informal The Oxford Union (a debating society); not to be conflated with Oxford University Student Union (a students' union).

Thesaurus

Closest in meaning: uniting, conjugation, unification, pairing, coupling, organized, mating, sum, federal, unionized, trade union, labor union, brotherhood, closed, join, matrimony

Translations

Every language

noun joint

日本語	ユニオン継ぎ手 yunion tsugite
हिन्दी	संयुक्त sãyukt
Français	connexion
Ελληνικά	αρμός armós, άρθρωση árthrosi, ένωση énosi, σύνδεσμος sýndesmos
Русский	му́фта múfta

noun the act of uniting or the state of being united

Español	unión
한국어	연맹 yeonmaeng, 동맹 dongmaeng
日本語	結合 ketsugō, 連邦 renpō, 聯盟 renmei, 同盟 dōmei
中文	聯盟 /联盟 liánméng, 聯合 /联合 liánhé, 同盟 tóngméng
हिन्दी	संघ saṅgh
Kiswahili	umoja
Português	união, junção
Français	union
Deutsch	Vereinigung, Union, Verein, Verband
Italiano	unione
Ελληνικά	ένωση énosi, σύνδεσμος sýndesmos
Română	unire, unitate, uniune
Русский	сою́з sojúz, соедине́ние sojedinénije, объедине́ние obʺjedinénije, слия́ние slijánije, у́ния únija
Tiếng Việt	liên minh, liên bang
العربية	اِتِّحَاد ittiḥād, اِتِّفَاق ittifāq
עברית	בְּרִית brit, אִגוּד, איגוד igúd, איחוד, אִחוּד ikhúd

noun that which is united; something formed by a combination of parts or members

Español	unión
日本語	連邦 renpō, 同盟 dōmei
中文	聯盟 /联盟 liánméng
हिन्दी	संयुक्त sãyukt
Kiswahili	shirikisho
Português	união
Français	groupement
Deutsch	Vereinigung, Union
Ελληνικά	ένωση énosi, σύνδεσμος sýndesmos
Română	uniune
Русский	сою́з sojúz, соедине́ние sojedinénije, объедине́ние obʺjedinénije
Tiếng Việt	liên minh, liên bang

noun in set theory

Español	unión
한국어	합집합 hapjiphap, 화집합 hwajiphap
日本語	和集合 washūgō, 合併集合 gappeishūgō, 結び musubi
中文	併集 /并集 bìngjí
हिन्दी	सम्मिलन sammilan
Português	união
Français	réunion
Deutsch	Vereinigung, Vereinigungsmenge
Italiano	unione
Ελληνικά	ένωση énosi
Română	reuniune
Русский	объедине́ние мно́жеств obʺjedinénije mnóžestv
Tiếng Việt	hợp, hội
עברית	איחוד, אִחוּד ikhúd

noun marriage

한국어	결혼 gyeolhon, 혼인 honin
日本語	結婚 kekkon, 婚姻 kon'in
中文	婚姻 hūnyīn, 結婚 /结婚
हिन्दी	जोड़ी joṛī
Português	matrimónio, matrimônio
Français	mariage
Deutsch	Ehe
Ελληνικά	σύζευξη sýzefxi, γάμος gámos
Русский	сою́з sojúz, бра́чный сою́з bráčnyj sojúz, брак brak, бракосочета́ние brakosočetánije
Tiếng Việt	hôn nhân
العربية	زَوَاج zawāj

noun sexual intercourse

한국어	성교 seonggyo
日本語	性交 seikō
中文	性交 xìngjiāo, 交合 jiāohé
हिन्दी	संभोग sambhog, समागम samāgam
Português	sexo
Français	accouplement, copulation, fornication
Deutsch	Vereinigung
Ελληνικά	ένωση énosi, συνουσία synousía
Русский	сноше́ние snošénije, совокупле́ние sovokuplénije
Tiếng Việt	tính giao

noun computing: certain data structure

日本語	共用体 kyōyōtai
Français	union
Русский	объедине́ние obʺjedinénije

Talk about this word

Cite this

MLA

"union." Wiktionary, via Micwyn, micwyn.com/word/union. Accessed 6 Nov. 2026.

APA

union. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/union

Chicago

"union." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/union.

BibTeX

@misc{union_2026,
  title = {union},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/union},
  urldate = {2026-11-06}
}

union

AI In plain words

union¹

Where it comes from

noun unions

verb unions · unioning · unioned

adjective more union · most union

Union²

Where it comes from

noun Unions

proper noun

Union³

Where it comes from

proper noun Unions

Union⁴

Where it comes from

proper noun the Union

Thesaurus

Translations

noun joint

noun the act of uniting or the state of being united

noun that which is united; something formed by a combination of parts or members

noun in set theory

noun marriage

noun sexual intercourse

noun computing: certain data structure

union^¹

Union^²

Union^³

Union^⁴