to add or attach something, especially a building, to a larger or more important thing, a building added on to a larger one or an area of land added to a country, state, etc.

in the annex, annexation of territory, annex building

Formal and Informal Expressions of annex

In different contexts, you can replace 'annex' with suitable alternatives. In a more formal setting, 'incorporate' is apt. In informal speech or writing, 'add on, tag on' is a commonplace synonym.

annex: Explore its Definition & Usage

annex Definition

1to add or attach something, especially a building, to a larger or more important thing
2a building added on to a larger one or an area of land added to a country, state, etc.

Using annex: Examples

Take a moment to familiarize yourself with how "annex" can be used in various situations through the following examples!

Example
The company plans to annex the adjacent building for expansion.
Example
The United States annexed Hawaii in 1898.
Example
The new wing was annexed to the main building.
Example
The annex is used for storage and as a workshop.

annex Synonyms and Antonyms

Synonyms for annex

attach
join
add
connect
incorporate

Antonyms for annex

Phrases with annex

in the annex
in a separate building or part of a building
Example
The library's rare book collection is kept in the annex.
annexation of territory
the act of taking control of a piece of land and adding it to a country or state
Example
The annexation of Crimea by Russia was widely condemned by the international community.
annex building
a building added on to a larger one
Example
The annex building houses the company's research and development department.

Origins of annex

from Latin 'annexus', meaning 'connected'

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Summary: annex in Brief

To 'annex' [ˈæneks] means to add or attach something, especially a building, to a larger or more important thing. It can also refer to a building added on to a larger one or an area of land added to a country, state, etc. Examples include 'The company plans to annex the adjacent building for expansion' and 'The United States annexed Hawaii in 1898.' Phrases like 'in the annex' and 'annex building' denote a separate building or part of a building.