v. t. - To join or attach; usually to subjoin; to affix; to append; -- followed by to.
v. t. - To join or add, as a smaller thing to a greater.
v. t. - To attach or connect, as a consequence, condition, etc.; as, to annex a penalty to a prohibition, or punishment to guilt.
v. i. - To join; to be united.
n. - Something annexed or appended; as, an additional stipulation to a writing, a subsidiary building to a main building; a wing.