Having a particular right or interest in something, especially a legal right or interest that is guaranteed and cannot be taken away. She has a vested interest in the success of the project, as her promotion depends on it.
Dressed in a particular type of clothing, especially formal or ceremonial attire. The officials were vested in their ceremonial robes for the inauguration.
Law: Having become legally enforceable or unconditional; fully secured and not liable to forfeiture. After five years of employment, her pension benefits are fully vested.