The meaning of UNION is an act or instance of uniting or joining two or more things into one. How to use union in a sentence.

One brother fought for the Union and one for the Confederacy. They celebrated their union [= marriage] with more than 200 friends and family members.

Learn about union basics, collective bargaining, labor-management partnerships, and the laws that govern unions.

formal She believes that the union (= marriage) of man and woman in holy matrimony is forever. The breathing exercises are designed to help forge a union of body, mind and spirit. Their marriage was …

When the thirteen colonies that became the United States came together, they formed a union. Marriage is another kind of union. Workers come together to form trade unions so that together they can have …

Dec 31, 2025 · From Middle English unyoun, from Old French union, from Late Latin ūniō, ūniōnem (“oneness, unity”), from Latin ūnus (“one”). Doublet of unio. union (countable and uncountable, plural …

Union definition: A set, every member of which is an element of one or another of two or more given sets.