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perpetual motion

   Also found in: Acronyms, Encyclopedia, Wikipedia, Hutchinson 0.07 sec.
perpetual motion
n.
The hypothetical continuous operation of an isolated mechanical device or other closed system without a sustaining energy source.
perpetual motion
Noun
motion of a hypothetical mechanism that continues indefinitely without any external source of energy
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.perpetual motionperpetual motion - motion that continues indefinitely without any external source of energy; impossible in practice because of friction
motion - a state of change; "they were in a state of steady motion"


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? Mentioned in ? References in classic literature
 
I was afraid your perpetual motion had bewitched you out of the remembrance of old times.
Mosses From An Old Manse and other stories by Hawthorne, Nathaniel View in context
The discovery of this Behoving Machine was the discovery of the political perpetual motion.
Little Dorrit by Dickens, Charles View in context
I can no more tell you the whys and wherefores of myself than I can lift myself up by the waistband and carry myself into the next county, as some one challenged a speculator in perpetual motion to do.
An Unsocial Socialist by Shaw, George Bernard View in context
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