Definition of perpetual motion in English:

perpetual motion

Syllabification: per·pet·u·al mo·tion

noun

1A state in which movement or action is or appears to be continuous and unceasing.
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 that, once activated, would run forever unless subject to an external force or to wear.
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?

Definition of perpetual motion in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day nous
Pronunciation: naʊs
noun
common sense; practical intelligence