union
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 →
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 →
3) Union is the act of joining things together. tree →
4) In maths, the union of two sets is all the things that are in one set or the other or both. tree →
5) A union can also mean a marriage between two people. tree →
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 →
- The United Kingdom is a union of four countries. tree →
- The union of the sets {1, 2, 3} and {3, 4} is {1, 2, 3, 4}. tree →
- The Union Jack flew over the town hall. tree →
- The union of two rivers made a big river. tree →
- Every member of the union voted. tree →
- For some years they lived happily together, and their union was blessed by the birth of two sons. tree →
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.
- Black Sea dolphins were hunted for oil and meat until hunting was banned, in the Soviet Union in 1966.
- Inside most of the European Union, the Schengen Area lets people cross borders without passport checks.
- After the Second World War the USA and the Soviet Union were rivals in the Cold War and raced to be first in space.
- In 1957 the Soviet Union launched Sputnik, the first artificial satellite, a metal ball that beeped as it circled the Earth.
Trees and pragmatics
Every meaning and example of «union» parsed by Mova, each sentence with its dependency tree and frames.