Vereinigung

noun
  1. The act of joining together or uniting different entities into a single entity. noun
    The vereinigung of the two companies resulted in a stronger market presence.
    The vereinigung of the two rivers created a larger waterway.
  2. An organization or association formed by a group of people for a common purpose. noun
    The cultural vereinigung organized several events to promote local traditions.
    She joined a vereinigung dedicated to environmental conservation.