1. treadmill - Noun
2. treadmill - Verb
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.
Source: Webster's dictionaryAs I inched sluggishly along the treadmill of the Maycomb County school system, I could not help receiving the impression that I was being cheated out of something. Out of what I knew not, yet I did not believe that twelve years of unrelieved boredom was exactly what the state had in mind for me. Harper Lee
Most of the time I meet my trainer at the gym and we do a lot of everything: weights circuit with cardio, football drills, sprinting with weights on the treadmill. Charisma Carpenter
Housework is a treadmill from futility to oblivion with stop-offs at tedium and counter productivity. Erma Bombeck
We are living in the machine age. For the first time in history the comedian has been compelled to supply himself with jokes and comedy material to compete with the machine. Whether he knows it or not, the comedian is on a treadmill to oblivion. Fred Allen
Note to self: While on the treadmill you may lip-sync to the songs on your iPod but DO NOT dance along. You look like an idiot. Chris Colfer
Once we started to urbanize, we put ourselves on this treadmill. We traded away stability for growth. And growth requires change. Geoffrey West