definition of annexes
Webster Dictionary (3.00 / 1 vote) Rate this definition: Annex (verb) to join or attach; usually to subjoin; to affix; to append; -- followed by to. Annex (verb) to join or add, as a smaller thing to a greater. Annex (verb) to attach or connect, as a consequence, condition, etc.; as, to annex a penalty to a prohibition, or punishment to guilt. Annex (verb)