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English definition of “treadmill”

treadmill

noun [C]    /ˈtredˌmɪl/
a machine for exercising on which you run or walk on a strip that moves back, so that you must move at the same speed as the strip : She works out on a treadmill. A treadmill is also a boring , regularly repeated activity or experience : My life has been a treadmill lately .
(Definition of treadmill noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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