|Origin:||Late Latin unio, from Latin unus 'one'|
1 [countable] also trade union British English, labor union American EnglishBELBEL
an organization formed by workers to protect their rights
the National Union of Teachers
Are you planning to join the union?
used in the names of some clubs or organizations:
the British Golf Union
3 [singular] formal
the act of joining two or more things together, or the state of being joined together
The artist's work shows the perfect union of craftsmanship and imagination.
Some militants favour independence for Kashmir or union with Pakistan.
a group of countries or states with the same central government:
the Soviet Union
used in the past to talk about the United States, especially the northern states during the Civil War
6 [uncountable and countable] formalSSF
7 [uncountable and countable] formal
the activity of having sex, or an occasion when this happens