union (Noun) — The United States (especially the northern states during the American Civil War). ex. "he has visited every state in the Union" ex. "Lee hoped to detach Maryland from the Union"
union (Noun) — An organization of employees formed to bargain with the employer. ex. "you have to join the union in order to get a job"
union (Noun) — The act of pairing a male and female for reproductive purposes. ex. "the casual unions of adolescents"
union (Noun) — The state of being joined, united or linked. ex. "there is strength in union"
union (Noun) — (law) the state of being a married couple voluntarily joined for life (or until divorce). ex. "God bless this union"
union (Noun) — Healing process involving the growing together of the edges of a wound or the growing together of broken bones.
union (Noun) — A political unit formed from previously independent people or organizations. ex. "the Soviet Union"
union (Noun) — A set containing all and only the members of two or more given sets. ex. "let C be the union of the sets A and B"
union (Noun) — The occurrence of a uniting of separate parts. ex. "lightning produced an unusual union of the metals"
union (Noun) — A device on a national flag emblematic of the union of two or more sovereignties (typically in the upper inner corner).
union (Noun) — The act of making or becoming a single unit. ex. "the union of opposing factions"
union (Adjective) — Being of or having to do with the northern United States and those loyal to the Union during the American Civil War. ex. "Union soldiers"
union (Adjective) — Of trade unions. ex. "the union movement" ex. "union negotiations" ex. "a union-shop clause in the contract"