1. having a legal right to something that cannot be taken away
Usage: legal
2. having a strong personal interest or involvement in something
3. wearing formal clothing, especially a vest or waistcoat
Usage: formal

Examples

• Employees become vested in the pension plan after five years of service.
• She has a vested interest in the company’s success since she owns shares.
• The board members are vested with the authority to make major decisions.
• Parents have vested rights in their children’s education.
• He appeared at the ceremony fully vested in formal attire.
• The community has a vested interest in keeping the park clean.
• After working there for ten years, he was fully vested in all benefits.