The meaning of PULL-UP is an exercise in which one hangs by the hands from a support (such as a horizontal bar) and pulls oneself up until the chin is level with the support; specifically : such an exercise done with the palms facing outward.

pull up 1. To lift someone or something up; to place or position someone or something upward or upright. In this usage, a noun or pronoun can be used between "pull" and "up."

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. As this happens, the elbows flex and the shoulders adduct and extend to bring the elbows to the torso.

pull up vb (adverb) 1. (Botany) (tr) to remove by the roots 2. (often foll by: with or on) to move level (with) or ahead (of) or cause to move level (with) or ahead (of), esp in a race 3. to stop 4. (tr) to rebuke