perpetual motion
noun/pəˌpetʃuəl ˈməʊʃn/
/pərˌpetʃuəl ˈməʊʃn/
[uncountable]- a state in which movement or action is or appears to be continuous, without ever stopping
- We're all in a state of perpetual motion in this office (= we're always moving around or changing things).
- His travel schedule keeps him in perpetual motion.
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- the movement of a hypothetical (= imagined) machine that can run forever without an external source of energy
- Scientists have never discovered the secret of perpetual motion.
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perpetual motion