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tread•mill



Pronunciation: (tred'mil"), [key]
n.
1. 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.
2. an exercise machine that allows the user to walk or run in place, usually on a continuous moving belt.
3. any monotonous, wearisome routine in which there is little or no satisfactory progress.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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