to attach, append, or add, esp. to something larger or more important.

to incorporate (territory) into the domain of a city, country, or state

Germany annexed part of Czechoslovakia.

to take or appropriate, esp. without permission.

to attach as an attribute, condition, or consequence.

something annexed.

a subsidiary building or an addition to a building

The emergency room is in the annex of the main building.

something added to a document; appendix; supplement

an annex to a treaty.

verb

detach , leave off , leave out

noun

addendum , addition , adjunct , affix , appendix , arm , attachment , ell , subsidiary , supplement , wing

verb

adjoin , affix , append , appropriate , associate , attach , connect , fasten , hitch on , hitch up , hook on , hook up , link , slap on , subjoin , tack on , tag , tag on , take on , take over , unite , acquire , add , arrogate , ell , extension , hook , join , procure , secure , seize , win , wing