What is the meaning of Pullover?

A sweater that must be put on by pulling it over the head; a sweater without buttons or a zipper in front.

An exercise performed lying on the back in which the arms are extended behind the head and exertion lifts the weight above the head.

An exercise in which the gymnast pulls up from a hang lifting the legs up and over the bar thus rolling into a support position.

An instance of a vehicle being pulled over.

pullover, sweater

Source: wiktionary.org