verb / noun

annex

AN-eks/ˈæneks/

To add something as an attached part of a larger whole.

The official annexes the neighboring territory, extending the larger jurisdiction's boundary.

An official formally incorporates a small neighboring territory into a visibly larger existing jurisdiction: paired physical maps show the same land before and after, with the larger jurisdiction retaining its identity while extending its boundary and authority over the smaller parcel.
Etymology

The underlying image is tying something to something else. In territorial use, that connection becomes formal incorporation under another authority, rather than merely physical attachment.

In context

Town Meeting TV37:20
In March 1778, 16 New Hampshire towns requested Vermont annex them, which Vermont agreed to do after a referendum.
Vermont Allegiance During the Revolutionary War with Benjamin Anderson | Ethan Allen Homestead

More examples

  • The agreement includes the technical tables in an annex.
  • The empire sought to annex the neighboring territory.
  • We annexed the supporting documents to the final report.

Forms

annex · annexes · annexed · annexing

annexation noun — The act of adding territory to a larger entity.

Similar words

append
Usually means adding material to the end of a document.
incorporate
Emphasizes making something part of a whole rather than attaching it.