Pullup (pull up and pull-up) plural pullups:1. An exercise: An exercise done for strengthening the arms and upper body, in which one lifts one's own weight while hanging from a bar.A pull-up is an upper-body strength exercise. The pull-up is a closed-chain movement where the body is suspended by the hands, gripping a bar or other implement at a distance typically wider than shoulder-width, and pulled up....