Definition of vested interest noun from the Oxford Advanced American Dictionary

 

vested interest

 noun
noun
 
vested interest (in something)
 
jump to other results
a personal reason for wanting something to happen, especially because you get some advantage from it They have a vested interest in keeping the club as exclusive as possible. Vested interests (= people with a vested interest ) are opposing the plan. She thinks that lawyers have a vested interest in making the legal process move slowly.
See the Oxford Advanced Learner's Dictionary entry: vested interest