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Perpetual motion   /pərpˈɛtʃuəl mˈoʊʃən/   Listen
noun
Motion  n.  
1.
The act, process, or state of changing place or position; movement; the passing of a body from one place or position to another, whether voluntary or involuntary; opposed to rest. "Speaking or mute, all comeliness and grace attends thee, and each word, each motion, forms."
2.
Power of, or capacity for, motion. "Devoid of sense and motion."
3.
Direction of movement; course; tendency; as, the motion of the planets is from west to east. "In our proper motion we ascend."
4.
Change in the relative position of the parts of anything; action of a machine with respect to the relative movement of its parts. "This is the great wheel to which the clock owes its motion."
5.
Movement of the mind, desires, or passions; mental act, or impulse to any action; internal activity. "Let a good man obey every good motion rising in his heart, knowing that every such motion proceeds from God."
6.
A proposal or suggestion looking to action or progress; esp., a formal proposal made in a deliberative assembly; as, a motion to adjourn. "Yes, I agree, and thank you for your motion."
7.
(Law) An application made to a court or judge orally in open court. Its object is to obtain an order or rule directing some act to be done in favor of the applicant.
8.
(Mus.) Change of pitch in successive sounds, whether in the same part or in groups of parts. "The independent motions of different parts sounding together constitute counterpoint." Note: Conjunct motion is that by single degrees of the scale. Contrary motion is that when parts move in opposite directions. Disjunct motion is motion by skips. Oblique motion is that when one part is stationary while another moves. Similar or direct motion is that when parts move in the same direction.
9.
A puppet show or puppet. (Obs.) "What motion's this? the model of Nineveh?" Note: Motion, in mechanics, may be simple or compound. Simple motions are: (a) straight translation, which, if of indefinite duration, must be reciprocating. (b) Simple rotation, which may be either continuous or reciprocating, and when reciprocating is called oscillating. (c) Helical, which, if of indefinite duration, must be reciprocating. Compound motion consists of combinations of any of the simple motions.
Center of motion, Harmonic motion, etc. See under Center, Harmonic, etc.
Motion block (Steam Engine), a crosshead.
Perpetual motion (Mech.), an incessant motion conceived to be attainable by a machine supplying its own motive forces independently of any action from without. According to the law of conservation of energy, such perpetual motion is impossible, and no device has yet been built that is capable of perpetual motion.
Synonyms: See Movement.


adjective
Perpetual  adj.  Neverceasing; continuing forever or for an unlimited time; unfailing; everlasting; continuous. "Unto the kingdom of perpetual night." "Perpetual feast of nectared sweets."
Circle of perpetual apparition, or Circle of perpetual occultation. See under Circle.
Perpetual calendar, a calendar so devised that it may be adjusted for any month or year.
Perpetual curacy (Ch. of Eng.), a curacy in which all the tithes are appropriated, and no vicarage is endowed.
Perpetual motion. See under Motion.
Perpetual screw. See Endless screw, under Screw.
Synonyms: Continual; unceasing; endless; everlasting; incessant; constant; eternal. See Constant.





Collaborative International Dictionary of English 0.48


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"Perpetual motion" Quotes from Famous Books



... skill, by Jove's command, That every word which, whisper'd here, Scarce vibrates to the neighbour ear, On the still bosom of the air Is borne and heard distinctly there— 190 The palace of an ancient dame Whom men as well as gods call Fame. A prattling gossip, on whose tongue Proof of perpetual motion hung, Whose lungs in strength all lungs surpass, Like her own trumpet made of brass; Who with an hundred pair of eyes The vain attacks of sleep defies; Who with an hundred pair of wings News from the furthest quarters brings, 200 Sees, hears, and tells, ...
— Poetical Works • Charles Churchill
... stool of office in the doctor's consulting room, swinging his legs. Would-be discoverers of perpetual motion might have received many hints from Bubble, though he himself would have scorned to consider the swinging of legs as motion. He was under the delusion that he was sitting perfectly still. For the doctor ...
— Up the Hill and Over • Isabel Ecclestone Mackay
... Me." Faith in Himself, as here. In the Greek the preposition translated in, would be better rendered into, as though the believer was ever approaching the heart of Christ in deeper, warmer, closer fellowship; perpetual motion toward, combined with unbroken rest in. Each of these three forms of faith plays an important ...
— Love to the Uttermost - Expositions of John XIII.-XXI. • F. B. Meyer
... granted, and we went into a sort of saloon, over-looking the Neckar; very small, very bright, and very close. The floor was slippery with polish; long narrow pieces of looking-glass against the walls reflected the perpetual motion of the river opposite; a white porcelain stove, with some old-fashioned ornaments of brass about it; a sofa, covered with Utrecht velvet, a table before it, and a piece of worsted-worked carpet under it; a vase of artificial flowers; and, lastly, an alcove ...
— Curious, if True - Strange Tales • Elizabeth Gaskell
... t' enslave; At length to try if I from rage could keep, I turn'd my back once more, and went to sleep. If you had willingly the belle resign'd, I was, my friend, to take a turn inclin'd; That had sufficed for me, since I, like you, Perpetual motion never ...
— The Tales and Novels, Complete • Jean de La Fontaine


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