treadmill Meaning, Definition & Usage

  1. noun an exercise device consisting of an endless belt on which a person can walk or jog without changing place
  2. noun a mill that is powered by men or animals walking on a circular belt or climbing steps
    tread-wheel; treadwheel.
  3. noun a job involving drudgery and confinement
    salt mine.

WordNet


Tread"mill` noun
Definitions
  1. 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. Also, a mill worked by horses, dogs, etc., treading an endless belt. or for physical exercise

Webster 1913