vested interest is a noun meaning "(law) an interest in which there is a fixed right to present or future enjoyment and that can be conveyed to another". It carries 2 recorded senses.
(law) an interest in which there is a fixed right to present or future enjoyment and that can be conveyed to another
law
groups that seek to control a social system or activity from which they derive private benefit
Definitions, synonyms and semantic relations for vested interest come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.