union

noun
\ ˈyün-yən \

Definition of union

 (Entry 1 of 2)

1a : an act or instance of uniting or joining two or more things into one: such as
(1) : the formation of a single political unit from two or more separate and independent units
(2) : a uniting in marriage also : sexual intercourse
(3) : the growing together of severed parts
b : a unified condition : combination, junction a gracious union of excellence and strength
2 : something that is made one : something formed by a combining or coalition of parts or members: such as
a : a confederation of independent individuals (such as nations or persons) for some common purpose
b(1) : a political unit constituting an organic whole formed usually from units which were previously governed separately (such as England and Scotland in 1707) and which have surrendered or delegated their principal powers to the government of the whole or to a newly created government (such as the U.S. in 1789)
(2) capitalized : the federal union of states during the period of the American Civil War
c capitalized : an organization on a college or university campus providing recreational, social, cultural, and sometimes dining facilities also : the building housing such an organization
d : the set of all elements belonging to one or more of a given collection of two or more sets

called also join, sum

3a : a device emblematic of the union of two or more sovereignties borne on a national flag typically in the upper inner corner or constituting the whole design of the flag
b : the upper inner corner of a flag
4 : any of various devices for connecting parts (as of a machine) especially : a coupling for pipes or pipes and fittings

union

adjective

Definition of union (Entry 2 of 2)

: of, relating to, dealing with, or constituting a union especially, capitalized : of, relating to, or being the side favoring the Union in the American Civil War Union troops

Keep scrolling for more

Examples of union in a Sentence

Noun

She joined the teachers' union. An embryo is created through the union of sperm and egg. a perfect union of Eastern and Western music
See More

Recent Examples on the Web: Noun

He is challenged and changed by this union with a whip-smart woman who always lives her truth. Alexandra Macon, Vogue, "We Need to Talk About Outlander Season 4," 25 Jan. 2019 But while civil rights groups welcomed the new legislation, police departments and unions have been far less receptive, arguing that the measure will expose information that needs to remain private. P.r. Lockhart, Vox, "A California city plans to shred years of police records before a new law makes them public," 27 Dec. 2018 Oh, and there are some lawsuits (whistleblowers, shareholders) and a case that union activity was being illegally suppressed. Elizabeth Lopatto, The Verge, "Elon Musk is the first influencer CEO," 21 Dec. 2018 Once a bastion of the labor movement, Wisconsin also witnessed a dramatic decline in union membership, to just 8 percent of the workforce. Glenn C. Altschuler, Philly.com, "'Fall of Wisconsin': Why Dems lose, and keep on losing," 13 July 2018 Hydrick Thomas, president of the national TSA employee union, told CNN that as many as 170 TSA workers called out sick at NYC's John F. Kennedy International last week. Sam Blum, Popular Mechanics, "TSA Workers Are Calling Out Sick as the Government Shutdown Rages On," 7 Jan. 2019 In addition to humor, the couple has credited counseling for their long-lasting union. Maria Carter, Country Living, "Brad Paisley and Kimberly Williams-Paisley's Real-Life Love Story Will Make You Swoon," 19 Nov. 2018 The settlement in principle of the national master UPS agreement is subject to approval by UPS local unions, and yet to be resolved are supplemental agreements, according to the Teamsters. Kelly Yamanouchi, ajc, "UPS reaches tentative labor deal with Teamsters," 22 June 2018 Britain is due to the leave the EU on March 29, but with May’s Brexit plans still not accepted, some British lawmakers, as well as union and business leaders, are arguing that voters should have one last say on any deal struck with Brussels. Christopher Carbone, Fox News, "London mayor calls for second referendum on Brexit, says negotiations are 'mired in confusion'," 16 Sep. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'union.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of union

Noun

15th century, in the meaning defined at sense 1a

Adjective

1634, in the meaning defined above

History and Etymology for union

Noun

Middle English, from Anglo-French, from Late Latin union-, unio oneness, union, from Latin unus one — more at one

Keep scrolling for more

Learn More about union

Statistics for union

Last Updated

20 Feb 2019

Look-up Popularity

Time Traveler for union

The first known use of union was in the 15th century

See more words from the same century

Keep scrolling for more

More Definitions for union

union

noun

English Language Learners Definition of union

: an organization of workers formed to protect the rights and interests of its members
: an act of joining two or more things together
: a group of states or nations that are ruled by one government or that agree to work together

union

noun
\ ˈyün-yən \

Kids Definition of union

1 : an act or instance of uniting or joining two or more things into one The river is formed by the union of two tributaries.
2 : something (as a nation) formed by a combining of parts or members
3 capitalized : the United States
4 capitalized : the group of states that supported the United States government in the American Civil War
5 : a device for connecting parts (as pipes)

Union

adjective

Kids Definition of Union

: relating to the group of states that supported the United States government in the American Civil War Union soldiers

union

noun
\ ˈyü-nyən \

Medical Definition of union

: an act or instance of uniting or joining two or more things into one: as
a : the growing together of severed parts union of a fractured bone
b : a chemical combination : bond
c : the joining of two germ cells in the process of fertilization

Keep scrolling for more

union

noun

Legal Definition of union

1 : an act or instance of uniting or joining two or more things into one especially : the formation of a single political unit from two or more separate and individual units
2 : something that is made one : something formed by a combining or coalition of its members: as
a : a confederation of independent individuals (as nations or persons) for some common purpose
b : a political unit constituting an organic whole formed usually from previously independent units (as England and Scotland in 1707) which have surrendered their principal powers to the government of the whole or to a newly created government (as the U.S. in 1789)

Keep scrolling for more

More from Merriam-Webster on union

Thesaurus: All synonyms and antonyms for union

Spanish Central: Translation of union

Nglish: Translation of union for Spanish Speakers

Britannica English: Translation of union for Arabic Speakers

Britannica.com: Encyclopedia article about union

Comments on union

What made you want to look up union? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

excited commotion or publicity

Get Word of the Day daily email!

Test Your Vocabulary

What did you just call me?! A Quiz

  • rows-of-various-emoji
  • If a member of the audience describes your speech as bombastic, does that person mean it is:
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!