1.nounA sweater that must be put on by pulling it over the head; a sweater without buttons or a zipper in front
2.nounAn exercise performed lying on the back in which the arms are extended behind the head and exertion lifts the weight above the head.
3.noun(horizontal bar) 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.