Definitions

1. noun

a building or area added to a main building, especially for offices or other purposes.

“The company relocated its headquarters to a newly constructed annexe on the outskirts of town.”

2. verb

to add something to a building, especially to extend its size or capacity.

“The new annexe will be built to house the growing team of employees.”

3. verb

to attach or join something to a main building or part of it.

“The engineers worked late to annexe the new wing to the main structure.”