A vest is a sleeveless piece of clothing that's usually worn over a shirt. Your dad might love to wear his favorite striped sweater vest to parties, which is less embarrassing than when he wears the orange furry one.
There are different kinds of vests, including sweater vests, puffy winter vests, and tailored suit vests, usually worn underneath a formal jacket. Some vests have buttons, and others have zippers or snaps. Some are even bullet proof! When vest is a verb, it means to grant or bestow: "The Queen vests control of the zoos to the Royal Zookeeper." Both meanings of vest come from the same root word, the Latin vestire, "to clothe."