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perpetual motion

Line breaks: per|pet¦ual mo¦tion

Definition of perpetual motion in English:

noun

[mass noun]
1A state in which movement or action is or appears to be continuous and unceasing: the planet is in perpetual motion the perpetual motion of the dance floor
More example sentences
  • So, it is not good sense to interpret the state of an electron in a stationary orbital as perpetual motion.
  • He is in perpetual motion.
  • Further, Leucippus proposed that atoms remain in perpetual motion.
1.1The motion of a hypothetical machine which, once activated, would run forever unless subject to an external force or to wear: the age-old quest for the secret of perpetual motion [as modifier]: a perpetual motion machine
More example sentences
  • Next thing you know, we'll find out that these firms are working on cold fusion and perpetual motion machines.
  • These findings frustrated the believers of a perpetual motion machine, and angered the industrial tycoons who sponsored the whole endeavor.
  • Do I think a perpetual motion machine will ever be invented?

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