1. Law A right or title, as to present or future possession of an estate, that can be conveyed to another.
2. A fixed right granted to an employee under a pension plan.
3. A special interest in protecting or promoting that which is to one's own personal advantage.
4. vested interests Those groups that seek to maintain or control an existing system or activity from which they derive private benefit.
vested interests 既得利益者，特权阶层：那些寻求维持或者控制一种能得到私人利益的现存的系统或者活动的群体组织