Annexation

An·nex·a·tion

Annexation

n.
  1. The act of annexing; process of attaching, adding, or appending; the act of connecting; union; as, the annexation of Texas to the United States, or of chattels to the freehold.
  2. The union of property with a freehold so as to become a fixture. Bouvier. (b) (Scots Law) The appropriation of lands or rents to the crown. (Law)