partnership

/ˈpɑːrtnərʃɪp/
noun
  1. A business arrangement in which two or more people share ownership, profits, and responsibilities.
    • Each partner in the partnership contributed money and skills to the venture.
    • The law firm operates as a partnership with three senior lawyers.
    • They formed a partnership to open a bakery together.
  2. A close working relationship or collaboration between people or groups.
    • A successful marriage is a partnership built on mutual respect.
    • The partnership between the school and the local library benefits students.
    • Their partnership in the research project led to a major discovery.