annex

Imagine a growing family needing more space. They might build an annex onto their house—a separate addition that's connected but distinct. That's the core idea! As a noun, an annex is an extra part added to a building, often with its own purpose (a school annex, a library annex).

As a verb, to annex is to take something—most often land—and make it officially part of a larger territory or authority. Countries may annex neighboring regions, and cities may annex nearby areas and bring them under city government.

You'll also meet an annex in documents: an attached section added to a report, treaty, or contract (often labeled "Annex A"). Whether it's a building, a boundary, or paperwork, an annex is a smaller part joined to a larger whole.

The word "annex" has a fascinating double life! Originally—and still commonly—it refers to a building addition. Think of a crowded hospital constructing an emergency care annex, or a museum opening a modern art annex. These are spaces that are physically connected to the main structure but serve a specific, separate purpose.

However, "annex" also functions as a powerful verb meaning to take control of something and incorporate it into a larger unit. Historically, this verb is strongly tied to politics and territory, and it often suggests doing so without the other side's consent. Countries have annexed lands for centuries—bringing them under their authority and treating them as part of their own domain. For example, the U.S. annexed Texas in 1845, and Russia announced the annexation of Crimea in 2014 (a move widely disputed internationally). You can also hear it in local government: a city may annex nearby land and make it officially part of the city.

Finally, you will often see "annex" in the world of paperwork and business. In this context, it is used as a noun to describe a document attached to a main report or contract. If you look at a legal agreement, you might find extra charts or data listed in "Annex A" at the very end. So, whether you are talking about architecture, geopolitics, or paperwork, "annex" implies expanding boundaries by attaching something new.