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English definition of “treadmill”

treadmill

noun [C] (WHEEL)    /ˈtred.mɪl/
a wide wheel turned by the weight of people climbing on steps around its edge, used in the past to provide power for machines or, more usually, as a punishment for prisonersPunishing by causing painHitting and beatingPunishing and punishments
(Definition of treadmill noun (WHEEL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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