shunt

Etymology

From Middle English shunten, schunten, schonten, schounten, shont, shonte, shount, shounten, shunte (“to move rapidly or suddenly, jerk; to swerve, turn away; to avoid, dodge, escape, evade”), either: * possibly a back-formation from Middle English shǒnen (“to decline to do, refuse; to abandon, forsake; to disdain, dislike, hate; to avoid, escape; to be afraid, fear; to be wary of”), from Old English sċunian, sċyniġan; see shun. Or * an alteration of Middle English shunden, *schunden, *schinden, from Old English scyndan, scendan (“to hasten, hurry”) (as in āscyndan (“to remove, take away”), from Proto-Germanic *skundijaną (“to compel, drive, push; to accelerate, rush, speed up”), from Proto-Indo-European *sku(n)t-, *ku(n)t- (“to rattle; to shake”). * from unrecorded Old English *sċunettan, a derivative of sċunian (“to shun, avaoid”). The English word is cognate with Danish skynde (“to hasten, hurry, speed”), Icelandic skynda, skunda (“to hasten”), Middle High German schünden (“to compel; to urge; to irritate”), Norwegian skynde (“to hurry, rush”), Swedish skynda (“to hasten, hurry; to scuttle, scurry”). Outside Germanic, compare Sanskrit स्कन्दति (skándati, “to dart, leap, spring, spurt or burst forth, ejaculate, assail, drop, split”), Albanian shkund (“to shake; to swig”). As regards the noun sense, compare Middle English shunt (“swerve; sudden jerk”), derived from the verb.

verb

1. (transitive) To cause to move (suddenly), as by pushing or shoving; to give a (sudden) start to.
   For we are all shunting—shunting—shunting / We're all shunting in this queer world of ours. / Nations are shunted like to our railway carriages: / As Napoleon shunted la belle France into war; / Princes are shunted into royal marriages; / Kings and Queens are shunted just like a railway car. [1877?], Jacques Geal, “We’re All Shunting”, in John Diprose, compiler, The Railway Song Book, London: Diprose & Bateman,[…], →OCLC, page 13, column 1
   The comet was burning blue in the distance, like a sickly torch, when I first sighted him, but he begun to grow bigger and bigger as I crept up on him. […] Thinks I, it won't do to run into him, so I shunted to one side and tore along. By and by I closed up abreast of his tail. 1907 December, Mark Twain [pseudonym; Samuel Langhorne Clemens], “Extract from Captain Stormfield’s Visit to Heaven: Taken from His Own MS.”, in Harper’s Monthly Magazine, volume CXVI, number DCXCI, New York, N.Y.: Harper & Brothers, →OCLC, page 41, column 2
2. (transitive) To divert to a less important place, position, or state.
   Here in England it is, thank God! the custom for us to shunt ourselves off the grand trunk railroad of business, in tearing up and down which our lives are mainly passed, into some quiet siding once every year. […] [W]hen July is running into August, and everything is breaking up, you feel that your business for the season—be it in commerce, law, or literature—is achieved, and that the time for your being temporarily shunted has arrived. 1862 October, “Q.”, “On Being Shunted”, in London Society. An Illustrated Magazine of Light and Amusing Literature for the Hours of Relaxation, volume II, number IX, London: Office, 49 Fleet Street, E.C., →OCLC, page 334, column 1
   This important question of the acquisition of Native lands has been treated as a perfect shuttlecock in the hands of the Government. […] So far as we know, it has not even been circulated amongst the Natives, so that it would be a monstrous thing to pass it into law this session. This question will therefore be necessarily shunted—the one question that is admitted to be of supreme importance to the Colony of New Zealand. Then, the question of the Native Land Courts is another of those which have been shunted. 12 July 1893, John Hall, “House of Representatives. First Readings—Financial Statement.”, in New Zealand. Parliamentary Debates. Fourth Session of the Eleventh Parliament. Legislative Council and House of Representatives, volume 79, Wellington: S. Costall, government printer, →OCLC, page 415, column 1
   Even as the new king appeared on the balcony of Buckingham Palace in a downpour to view a weather-attenuated flyby, much of the press attention focused on Harry’s absence. (Charles’s heir, Prince William, was shunted off to the side with his family.) 2023-05-06, James Poniewozik, “Charles III Was Crowned King. But Can He Ever Be the Star?”, in The New York Times
3. (transitive) To provide with a shunt.
   to shunt a galvanometer
   Routine preoperative shunting of tumor patients is no longer common practice because many patients remain shunt free after tumor removal. Dias and Albright reported a series of 58 patients with posterior fossa tumors and hydrocephalus. Twenty-five patients were shunted preoperatively, 17 had external ventricular drains (EVDs) and 16 had no preoperative ventricular catheterization. Twenty-four of the 33 patients not initially shunted remained shunt free at long-term follow-up. 2008, Richard C. E. Anderson, Hugh J. L. Garton, John R. W. Kestle, “Treatment of Hydrocephalus with Shunts”, in A. Leland Albright, Ian F. Pollack, P. David Adelson, edited by Birgitta Brandenburg, Principles and Practice of Pediatric Neurosurgery, 2nd edition, New York, N.Y.: Thieme Medical Publishers, page 112, column 1
4. (transitive, computing) To move data in memory to a physical disk.
   A momentary power spike had caused a blip, forcing the backup system to shunt Carella's current work into a safety file. It was standard operating procedure, a decision made by the online computer itself. 2010, Don Pendleton, Mike Linaker, “Prologue”, in System Corruption (Don Pendleton’s The Executioner), Toronto, Ont.: Gold Eagle
5. (transitive, electricity) To divert electric current by providing an alternative path.
   The method of running an electric motor herein set out, which consists in starting the motor with the two halves of its armature in series with a resistance in a two-pole field, then gradually cutting out the resistance, then including the resistance and shunting one-half the motor, then opening the circuit of the shunted half and throwing the two halves of the motor in multiple in a four-pole field, and finally, cutting out the resistance. 2 April 1895, Merle J. Wightman, Regulation of Continuous-current Motors, US Patent 542,667, page 2, column 2
6. (transitive, rail transport) To move a train from one track to another, or to move carriages, etc. from one train to another.
   Porter, run over while shunting a luggage train, in consequence of his getting entangled in shunting-rope. 1846, “Report”, in Report of the Officers of the Railway Department to the Lords of the Committee of the Privy Council for Trade: With Appendices I. & II. For the Years 1844–45.[…] (House of Commons of the United Kingdom, 1846 Session, Accounts and Papers; 15 (Railway Department)), volume XXXIX, London: Printed by W[illiam] Clowes and Sons,[…], for Her Majesty's Stationery Office, →OCLC, class no. 3 (Accidents Attended with Personal Injury to Servants of the Company, under Circumstances Not Involving Danger to the Public), page xxi
7. (transitive, chiefly road transport, informal, Britain) To have a minor collision, especially in a motor car.
   The main argument for the use of culpability as a categorizer is that some accidents can be said to be independent of the behaviour of at least one of the drivers, for example, being shunted when having stopped for a red light (in a slow and controlled manner, at least). 2017, Anders af Wåhlberg, “Traffic Accident Involvement Taxonomies”, in Driver Behaviour and Accident Research Methodology: Unresolved Problems (Human Factors in Road and Rail Transport), Boca Raton, Fla.: CRC Press
8. (transitive, surgery) To divert the flow of a body fluid.
   There are times when one has no alternative other than to attempt to shunt the cerebrospinal fluid into the pleural cavity, a potential space, which may occasionally be capable of absorbing the fluid. 1987, Anthony J. Raimondi, “Hydrocephalus”, in Pediatric Neurosurgery: Theoretical Principles; Art of Surgical Techniques, New York, N.Y., Berlin: Springer-Verlag, →DOI, page 474, column 2
9. (transitive, obsolete, Britain, dialectal) To turn aside or away; to divert.
10. (finance, UK, historical) To carry on arbitrage between the London stock exchange and provincial stock exchanges.

noun

1. An act of moving (suddenly), as due to a push or shove.
   Blindside loosie Jerome Kaino got [Conor] Murray after he'd kicked in the 10th minute, then the halfback hurt a wrist after Brodie Retallick gave him a shunt. 28 June 2017, Kevin Norquay, “Lions tour: Warren Gatland says clown cartoon is part of personal campaign against him”, in Stuff.co.nz, archived from the original on 2017-11-03
2. (electricity) A connection used as an alternative path between parts of an electrical circuit.
   The sensibility of a galvanometer may be varied in a very simple manner by the use of what is termed a shunt. A shunt is a resistance coil, or coil of fine wire used to divert some definite portion of a current, taking it past a galvanometer instead of through its coils. 1873, Fleeming Jenkin, “Galvanometers”, in Electricity and Magnetism, New York, N.Y.: D. Appleton and Co.[…], §14, page 201
3. (firearms) The shifting of the studs on a projectile from the deep to the shallow sides of the grooves in its discharge from a shunt gun.
   In length, this gun was the same as the French, but weighed 9 cwt. less. It was rifled in six grooves on the shunt plan, in the form in which it has been generally applied to large guns, with the difference that some of the angles of the grooving were rounded off. […] To impede fouling, a slightly greater windage was allowed in the chamber of the shunt gun, the diameter there being 0.04 greater than at the mouth of the bore. 1865 October, “Rifled Guns and Missiles”, in Colburn’s United Service Magazine and Naval and Military Journal, part III, number CCCCXLIII, London: Hurst and Blackett, publishers, successors to Henry Colburn,[…], →OCLC, page 170
   The shunt system, of which the 64-pr. is the only example now in the service, has been considered inferior to the Woolwich, because besides being unnecessarily complicated, the grooves which are cut with abrupt sharp angles weaken the gun. […] [I]n the shunt gun, however, in addition to the mere fact of the driving side of the double groove being shallow, and the loading side deep, the two grooves join in one deep one at 2 feet 7.5 inches from the muzzle, […] 1870, Charles Orde Browne, “Section II. Muzzle-loading Armstrong, Shunt System.”, in Ammunition. A Descriptive Treatise on the Different Projectiles, Charges, Fuzes, &c., at Present in Use for Land and Sea Service, and on Other War Stores Manufactured in the Royal Laboratory, part II (Ammunition for Rifled Ordnance), London: Printed under the superintendence of Her Majesty's Stationery Office by George Edward Eyre and William Spottiswoode,[…], →OCLC, page 108
4. (medicine, veterinary medicine) An abnormal passage between body channels.
   Portosystemic shunts can be congenital or acquired with congenital PSS commonly comprising a single communicating vessel between the portal venous circulation and the systemic circulation via the caudal vena cava or azygos vein. Of congenital shunts, 66–75% are extrahepatic. Intrahepatic portosystemic shunts are most commonly identified in larger breeds of dog (though we have also seen a number of terriers with intrahepatic shunts through our clinic). 2018, Jon[athan David] Wray, “Case 11 Presenting with Mentation Abnormalities”, in Canine Internal Medicine: What’s Your Diagnosis?, Hoboken, N.J., Chichester, West Sussex: Wiley-Blackwell, John Wiley & Sons, section C (Hepatobiliary Disease), page 127
5. (surgery) A passage between body channels constructed surgically as a bypass; a tube inserted into the body to create such a passage.
   We present an extremely rare case of delayed and combined ventriculoperitoneal shunt blockage, viscus perforation and migration into the urethra manifested by a repeated urinary tract infection. This was discovered six months after the shunt was inserted. 2011 October, T. H. Chen et al., “Combined Ventriculoperitoneal Shunt Blockage, Viscus Perforation and Migration into Urethra, Presenting with Repeated Urinary Tract Infection”, in Annals of the Royal College of Surgeons of England, volume 93, number 7, →DOI, →PMID, abstract, page e151
6. (rail transport) A switch on a railway used to move a train from one track to another.
   These improvements consist, firstly, in a novel construction of apparatus to be attached to or applied upon railways, at those parts termed switches, shunts, or moveable rails, which are commonly used for transferring engines, carriages, or trains, from one line of rails to another, as occasion may require, and which apparatus I call a "switch or shunt protector." 17 December 1838, John Hawkshaw, “[Recent Patents.] To John Hawkshaw, of Manchester, in the County of Lancaster, Civil Engineer, for His Invention of Certain Improvements in Mechanism or Apparatus Applicable to Railways, and also to Carriages to be Used thereon”, in W[illiam] Newton, editor, The London Journal and Repertory of Arts, Sciences, and Manufactures, volume XV (Conjoined Series), number XCII, London: Published by W. Newton,[…], published 1840, →OCLC, page 74
7. (chiefly road transport, informal, Britain) A minor collision between vehicles.
   At the first race in Brazil, I became involved in a four-car shunt. I won't go into too much detail now, except to say that the accident had nothing to do with me. […] Everyone else was avoiding the accident when [Jos] Verstappen lost control on the grass, came right into me – and off we all went. It was a huge shunt. 2017, Eddie Irvine, with Maurice Hamilton, “No Big Deal”, in Green Races Red, updated edition, London: CollinsWillow