1. (

• treadmill ,

) an exercise device consisting of an endless belt on which a person can walk or jog without changing place ;

2. (

• treadmill ,
• treadwheel ,
• tread-wheel

) a mill that is powered by men or animals walking on a circular belt or climbing steps ;

3. (

• treadmill ,
• salt_mine

) a job involving drudgery and confinement ;