What is the meaning of Annex?

An addition, an extension.

An appendix to a book or document.

An addition or extension to a building.

An addition to the territory of a country or state, from a neighbouring country or state, normally by military force.

To add something to another thing, especially territory; to incorporate.

To attach or connect, as a consequence, condition, etc.

To join; to be united.

annex (an addition, an extension)

annex (an addition to a building)

attached

annex (an addition to a building)

annex (an addition, an extension)

Source: wiktionary.org