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English definition of “union”

union

noun     /ˈjuːnjən/
JOBS [C] (also UK trade union, also US labor union) B1 an organization that represents people who do a particular job : a teachers '/ firefighters ' unionIndustrial relations
GROUP [U, no plural] B2 a situation in which two or more countries , groups , etc join together to make one country , group , etc : a move towards full economic union of EU countries → See also the European UnionConnecting and combiningVariety and mixturesMixing and mixtures
(Definition of union noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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