HyperDic: perpetual_motion

English > 1 sense of the expression perpetual motion:
NOUNstateperpetual motionmotion that continues indefinitely without any external source of energy
English > perpetual motion: 1 sense > noun 1, state
Meaningmotion that continues indefinitely without any external source of energy; impossible in practice because of friction.
BroadermotionA state of change

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