Treadmill
WordNet
noun
(1) A job involving drudgery and confinement
(2) A mill that is powered by men or animals walking on a circular belt or climbing steps
(3) An exercise device consisting of an endless belt on which a person can walk or jog without changing place
WiktionaryText
English
Noun
- A piece of indoor sporting equipment used to allow for the motions of running or walking while staying in one place.
- A mill worked by persons treading upon steps on the periphery of a wide wheel having a horizontal axis. It is used principally as a means of prison discipline.
- A mill worked by horses, dogs, etc., treading an endless belt.