Definition of: annex

(ə·neks′) v.t.
1. To add or append, as an additional or minor part, to existing possessions; affix.
2. To attach, as an attribute, condition, or consequence: What punishment is annexed to vice?
3. Archaic: To join; unite.
—noun (an′eks)
1. An addition to a building; also, a nearby building used in addition to the main building.
2. A supplementary service or department.
3. An addition to a document; addendum.
4. Mil. An appendix to a combat order specifying the details prescribed in a given field or subject: an artillery annex. [ < F annexer < L annexus, pp. of annectere tie together < ad- to + nectere tie]
—an·nex′·a·ble adjective
—an·nex′ive adjective