| 1. | a special interest in an existing system, arrangement, or institution for particular personal reasons. |
| 2. | a permanent right given to an employee under a pension plan. |
| 3. | vested interests, the persons, groups, etc., who benefit the most from existing business or financial systems. |

| vested interest n.
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Vested Interest
A financial or personal stake one entity has in an asset, security, or transaction.
Investopedia Commentary
For example, if you have a mortgage, your bank has a vested interest on the sale of your house.
See also: Right
vested interest
A personal stake in something, as in She has a vested interest in keeping the house in her name. This term, first recorded in 1818, uses vested in the sense of "established" or "secured."