Definitions of vest:

• noun:   a man's sleeveless garment worn underneath a coat
• noun:   a collarless men's undergarment for the upper part of the body
• verb:   become legally vested

  Example: "The property vests in the trustees"

• verb:   place (authority, property, or rights) in the control of a person or group of persons

  Example: "She vested her vast fortune in her two sons"

• verb:   clothe formally; especially in ecclesiastical robes
• verb:   clothe oneself in ecclesiastical garments
• verb:   provide with power and authority

  Example: "They vested the council with special rights"

• name:  A surname (common: 1 in 25000 families; popularity rank in the U.S.: #2776)