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# union

«union» in Mova's school dictionary: **a group of workers who join together to protect their pay…** — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

### part of speech

noun (a union, unions; union, uncountable)

### meaning for a pupil

1) A union is a group of workers who join together to protect their pay and rights (a trade union, a labor union). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#m1)

2) A union is a group of countries or states joined together, such as the European Union or the United States (once called «the Union»). [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#m2)

3) Union is the act of joining things together. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#m3)

4) In maths, the union of two sets is all the things that are in one set or the other or both. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#m4)

5) A union can also mean a marriage between two people. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#m5)

### sense in the lessons

In maths, sets: A ∪ B is the union — every member of both sets, each listed once. In history and social studies, unions of workers, and countries forming unions. A student union is a club for university students. The Union Jack is the flag of the United Kingdom. Phrases: «trade union», «the European Union», «Union Jack», «the union of two sets».

### examples

- The workers joined a union to ask for fair pay. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#x1)
- The United Kingdom is a union of four countries. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#x2)
- The union of the sets {1, 2, 3} and {3, 4} is {1, 2, 3, 4}. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#x3)
- The Union Jack flew over the town hall. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#x4)
- The union of two rivers made a big river. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#x5)
- Every member of the union voted. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#x6)
- For some years they lived happily together, and their union was blessed by the birth of two sons. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/#x7)

### note

Countable noun: «a union», «unions». Starts with a «you» sound, so we say «a union», not «an union». In maths, the union counts shared members only once: the union of {1, 2} and {2, 3} has 3 members, not 4. Do not confuse with «onion».

### In the corpora

- [There are also ways workers stand up for themselves: unions, strikes, picket lines and tribunals.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/4-when-work-goes-wrong/4/)
- [Black Sea dolphins were hunted for oil and meat until hunting was banned, in the Soviet Union in 1966.](https://md.mova.elamur.ai/free/en/corpora/school/biology/374-ukraine-s-waters-danube-delta-pelicans-black-sea-dolphins-sturgeon-and-gobies/12/)
- [Inside most of the European Union, the Schengen Area lets people cross borders without passport checks.](https://md.mova.elamur.ai/free/en/corpora/school/geography/31-borders-why-they-are-where-they-are/16/)
- [After the Second World War the USA and the Soviet Union were rivals in the Cold War and raced to be first in space.](https://md.mova.elamur.ai/free/en/corpora/school/history/35-space-from-sputnik-to-the-moon/5/)
- [In 1957 the Soviet Union launched Sputnik, the first artificial satellite, a metal ball that beeped as it circled the Earth.](https://md.mova.elamur.ai/free/en/corpora/school/history/35-space-from-sputnik-to-the-moon/6/)

### Trees and pragmatics

[Every meaning and example of «union» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/U/union/), each sentence with its dependency tree and frames.