What is the meaning of perpetual motion?

noun

  • Motion that continues indefinitely without any external source of energy; impossible in practice because of friction. .
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). perpetual motion. Retrieved September 22, 2026, from http://smartdefine.org/perpetual_motion/definitions/1245106
ChicagoWordNet. 2010. "perpetual motion" http://smartdefine.org/perpetual_motion/definitions/1245106 (accessed September 22, 2026).
HarvardWordNet 2010, perpetual motion, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/perpetual_motion/definitions/1245106>.
MLAWordNet. "perpetual motion" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/perpetual_motion/definitions/1245106>