cession

noun
  1. The formal giving up of rights, property, or territory by a state or nation, typically by treaty. noun
    The cession of the territory was finalized after lengthy negotiations.
    The treaty included the cession of several islands to the neighboring country.
  2. The act of yielding or surrendering something, such as rights or possessions. noun
    The cession of control over the company was a difficult decision for the founder.
    There was a cession of power to the new board of directors.