[ C ] a strong personal interest in something because you could get an advantage from it既得利益
As both a teacher and parent, she had a vested interest in seeing the school remain open.身为教师兼家长,保证学校不被关闭符合她的既得利益。
vested interests [ plural ] often disapproving people or organizations who have a financial or personal interest in a business, company, or existing system既得利益人群;既得利益集团
A compromise has to be reached between all the powerful vested interests before any restoration work in the city can take place.势力强大的各既得利益集团间必须先达成妥协,城市整修工作才有可能开始。