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union

noun

  1. act of uniting or joining two or more things into one
  2. operation in set theory; union (denoted by ∪) of a collection of sets is the set of all distinct elements in the collection
L6563 on Wikidata ↗

Wiktionary

Pronunciation: /ˈjuː.njən/ / /ˈjuː.ni.ən/

adj

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

  1. Belonging to, represented by, or otherwise pertaining to a labour union.

    Actors have to be union to get work here.

  2. federal.

    The union government of India

name

Etymology: Clipping of Oxford Union.

  1. The Oxford Union (a debating society); not to be conflated with Oxford University Student Union (a students' union).

noun

Etymology: (locomotive): Derived from the name of the only U.S. company to use that configuration.

  1. The 0-10-2 locomotive wheel arrangement.
  2. The canton of the United States flag: the portion of the flag containing stars on a blue background.

verb

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

  1. To combine sets using the union operation.