1. The assumption of an important position; usually, a position of power.
2. The formal acceptance by a state of an international treaty or convention.
3. Agreement or consent, usually when given unwillingly.
4. An item added to a collection.
5. The right of an owner to add to some property by natural growth or improvement.
6. The act of attaining or gaining access to a new office, right, or position; for example, a throne.