Vest  —n. 1 undergarment worn on the trunk. 2 us & austral. Waistcoat. —v. 1 (foll. By with) bestow (powers, authority, etc.) On. 2 (foll. By in) confer (property or power) on (a person) with an immediate fixed right of future possession. 3 clothe (oneself), esp. In vestments. [latin vestis garment]