union

Meanings

1. 1
   adj

   being of or having to do with the northern United States and those loyal to the Union during the American Civil War

   Union soldiers

2. 2
   adj

   of trade unions

   The union movement has a strong sway in certain counties.

3. 3
   noun

   the act of making or becoming a single unit

   The union of opposing factions came as a surprise to many.

4. 4
   noun

   the act of pairing a male and female for reproductive purposes

   The union at the zoo between the two tigers was a success.

5. 5
   noun

   the occurrence of a uniting of separate parts

   Lightning produced an unusual union of the metals.

6. 6
   noun

   a set containing all and only the members of two or more given sets

   Let C be the union of the sets A and B.

7. 7
   noun

   an organization of employees formed to bargain with the employer

   You have to join the union in order to get a job.

8. 8
   noun

   a political unit formed from previously independent people or organizations

   The union between the conservatives and the liberals did not last long.

Etymology

From Middle English unyoun, from Old French union, from Late Latin ūniō, ūniōnem (“oneness, unity”), from Latin ūnus (“one”). Doublet of unio.