<p><strong>Noun</strong></p><ul><li>an apparatus for producing rotary motion by the weight of people or animals, treading on a succession of moving steps or a belt that forms a kind of continuous path, as around the periphery of a pair of horizontal cylinders.</li><li>an exercise machine that allows the user to walk or run in place, usually on a continuous moving belt.</li><li>any monotonous, wearisome routine in which there is little or no satisfactory progress.</li></ul>