annex

Short definition from Wiktionary

Noun

1. 1
   An addition, an extension.
2. 2
   An appendix to a book or document.
3. 3
   An addition or extension to a building.
4. 4
   An addition to the territory of a country or state, from a neighbouring country or state, normally by military force.

Verb

1. 1
   To add something to another thing, especially territory; to incorporate.
2. 2
   To attach or connect, as a consequence, condition, etc.
3. 3
   To join; to be united.

Proper noun

1. 1
   A census-designated place in Malheur County, Oregon, United States.