Loop

Loop (pronounced loop)

(1) A portion of a cord, ribbon, etc., folded or doubled upon itself so as to leave an opening between the parts; the opening so formed.

(2) Anything shaped more or less like a closed curve, as a line drawn on paper, a part of a letter or other symbol, a part of a path, or a line of motion.

(3) A curved piece or a ring of metal, wood, or the like, used for the insertion of something, as a handle, etc.

(4) In clinical slang, an intrauterine device (IUD), so named for the “loop” shape.

(5) In aeronautics, a maneuver executed by an airplane in such a manner that the airplane describes a closed curve in a vertical plane.

(6) In urban mass-transportation, a circular area at the end of a trolley line, railroad line etc, where cars turn around; (transport); a public transport (bus, rail, tram etc) route that starts and ends at the same point.

(7) In highway design, an arm of a cloverleaf where traffic may turn off or onto a main road or highway.

(8) In road design, a ring road or beltway.

(9) In physics, the part of a vibrating string, column of air or other medium, etc, between two adjacent nodes.

(10) In electricity, a closed electric or magnetic circuit.

(11) In computing, the reiteration of a set of instructions in a routine or program (which can be intentional or an error); a sequence of instructions repeated until or while a particular condition is satisfied.

(12) In biological science, a wire, usually of platinum, one end of which is curved to form a loop, used for transferring microorganisms from one medium to another.

(13) In biochemistry, a flexible region in a protein's secondary structure.

(14) A sandbar enclosing (or nearly enclosing) a body of water.

(15) In figure skating, a school figure in which a skater traces a large half circle, a small oval within its arc, and another large half circle to complete the figure while remaining on the same skating edge.

(16) As “The Loop”, the main business centre in the CBD of Chicago, Illinois.

(17) A small or narrow opening in a wall; a loophole (archaic).

(18) In metalworking, a hot bloom of pasty consistency, to be worked under a hammer or in rolls (the old alternative spelling was loup (mass of iron)).

(19) In graph theory, an edge that begins and ends on the same vertex.

(20) In topology, a path that starts and ends at the same point.

(21) In algebra, a quasi-group with an identity element.

(22) In North American use, a sports league (now rare).

(23) In dactylography (the study of fingerprints), one of the three primary shapes assumed by the ridges (arches, loops, and whorls).  (Dermatoglyphics is the broader scientific study of the patterns of ridges on the fingers, palms, toes, and soles).

(24) To form into a loop.

(25) To make a loop in.

(26) To enfold or encircle in or with something arranged in a loop.

(27) To fasten by forming into a loop, or by means of something formed into a loop (often followed by up).

(28) In ballistics, to cause a missile or projectile to trace a looping or loop-like trajectory while in flight.

(29) To fly an airplane in a loop or series of loops.

(30) In electronics, to connect conductors in the shape of a loop within a closed electric or magnetic circuit.

(31) In film, television etc production, to complete by recording dialogue, sound effects, etc onto an existing film track or soundtrack; an endless strip of tape or film allowing continuous repetition.

(32) In zoology, to move by forming loops (certain worms, caterpillars etc).

1350–1400: From the Middle English loupe & loup (loop of cloth; loophole; noose), from the earlier lowp-knot (loop-knot), of North Germanic origin, from the Old Norse hlaup (a run), used in the sense of “a running knot”, from hlaupa (to leap), ultimately from the Proto-Germanic hlaupaną (to leap, run) (and related to the Swedish löp-knut (loop-knot), the Danish løb-knude (a running knot) and the Danish løb (a course)..Etymologists are divided over whether loop has any connection with the Middle Irish & Old Irish lúb (bend, fold, loop) and perhaps akin to “leap”; nor is it clear if there was any relationship with the Middle Dutch lūpen (lie in wait, peep, peer).  The special use in metalworking dates from 1665-1675 and was etymologically unrelated; it was from the French loupe, a special use of loupe (wen, knob, gnarl), ultimately from a Germanic source.  The verb was derived from the noun.  Loop & looping are nouns & verbs, looper is a noun, looped is a verb & adjective and loopable & loopy are adjectives; the noun plural is loops.

Inner hippie: Lindsay Lohan likes the peace sign and made it her signature gesture but in an age when high definition photography makes possible, even at a distance, the precise capturing of the arches, loops, and whorls of fingerprints, it’s now a potential risk.  AI (artificial intelligence) engines are now reported as achieving a success rate in excess of 50% in generating fake fingerprints so accurately they can “fool” biometric scanners.

As an acronym, LOOP can mean (1) loss of offsite power, (2) Listed on Other Page (online marketplaces), (3) Law of One Price (finance; economic theory) and Long-Range Open Ocean Patrol (admiralty jargon).  In dactylography (the study of fingerprints), the three primary shapes assumed by the ridges (arches, loops, and whorls) were first formerly defined in 1880.  It was first used of magnetic recording tape or film in 1931 while in computer programming in the sense of “a sequence of instructions, executed repeatedly”, the first known reference dates from 1947.  The noun looper (plural loopers) can mean (1) someone who loops (in various contexts, (2) an instrument or tool, such as a bodkin, for forming a loop in yarn or cord etc, (3) A moth having a caterpillar which arches its body into a loop in order to bring the back part of the body forward as it walks due to having fewer prolegs (an appendage of the abdomen of some insect larvae), (4) a (no almost always electronic) tool for creating music loops, (5) a golf caddy and (6) in baseball, a synonym of blooper (a fly ball that is weakly hit just over the infielders).  The adjective loopy can describe (1) something in such a shape or (2) (in slang) someone thought crazy or deranged.  The latter meaning dates from as late as 1923 but a century earlier it had entered English in the sense of “crafty or deceitful) in the novels of Sir Walter Scott (1771–1832).

Lindsay Lohan in Loop magazine.

There are literally dozens of derived “loop” phrases and idiomatic forms, some of the better known being: “infinite loop” (also as endless loop) (in computer programming a series of instructions which repeats until interrupted), “feedback loop” (a self-reinforcing or self-weakening effect which was used in the language of the military, political science, psychology, physics and other fields before becoming popular in discussions of global warming, “close the loop” (in managerial jargon, to follow up; to tie up loose ends; to resolve), “in the loop” (being well-informed; up to date; having current knowledge; being part of the discussion; the companion antonym being “out of the loop”, “fruitloop” (someone thought crazy or deranged (Fruit Loops originally a brand of sugary breakfast cereal), “death loop” (in video gaming the situation in which a player is killed and then respawns in the exact same time and place, destined thus endlessly to be killed, usually in a gruesome way, “belt loop” (the fittings on trousers & skirts through which one’s belt passes), “Lebanese loop” (in slang the “skimming device” fitted to an automatic teller machine (ATM or “cash dispenser”) used by criminals to collect personal information (such as pin numbers), “loophole” (in figurative use an ambiguity or exception in a rule or law that can be exploited in order to avoid the usual consequences (and originally "a slit in a castle wall used for observation or mounting a weapon)) and “loop quantum gravity” (a mysterious theory which attempts to reconcile quantum mechanics and general relativity, according to which space can be regarded as an extremely fine fabric of finite loops).

In the loop: MECCA MAXIMA, Bondi Junction, Sydney, Australia.

MECCA Cosmetica is an Australian cosmetics house with a presence in Australia, New Zealand, the UK and the PRC (People’s Republic of China), its private label brands including Mecca Cosmetica, Mecca Max, Kit and Mecca-ssentials.  It runs a programme (a kind of hybrid of a loyalty & reward scheme) called “Beauty Loop”, organized into layers, the parameters of which are based on one’s annual spend; as one spends more, one ascends to a higher level and, the higher one’s level, the greater the rewards (ie an effective discount).  The MECCA Beauty Loop has four levels of recognition (1, 2, 3 & 4) and purchases made online or in-store contribute to one’s annual total.  MECCA labels the customer profile in the Beauty Loop layers progressively as (1) Beauty Discoverer, (2) Beauty Devotee (3) Beauty Aficionado and (4) Beauty Connoisseur, explaining the Beauty Loop mechanics thus:

Level 1: Aus$300.00–Aus$599.99 spend per year: As a Beauty Discoverer, every day is a beauty adventure: exploring new products, new brands, new categories and experiencing them for the very first time.  Come with us on this beauty journey where we will share with you our love of beauty with four rewards each year, including Beauty Loop Boxes (a curation of special samples) and Beauty Loop Bonuses (extra beauty products we just need to share!).  Plus, a gift to celebrate your birthday, when you spend $300 AUD per year (12 months).

Level 2: Aus$600.00–Aus$1,199.99 spend per year: As a Beauty Devotee, you are immersed in the world’s best in beauty. And just like us, you love to hear about the latest beauty trends, breakthroughs and products.  As a Level 2 member you will receive seven rewards each year, including Beauty Loop Boxes (a curation of special samples) and Beauty Loop Bonuses (extra beauty products we just need to share!).  Plus, a gift to celebrate your birthday, when you spend $600 AUD per year (12 months).

Level 3: Aus$1,200.00–Aus$3,499.99 spend per year: As a Beauty Aficionado, you live and breathe all things beauty: you know all about the tried-and-trusted classics but also love to explore what’s fresh and new. We’ll bring you more of the world you love with eight rewards each year, including Beauty Loop Boxes (a curation of special samples) and Beauty Loop Bonuses (extra beauty products we just need to share). Plus, one complimentary makeup application, a gift to celebrate your birthday, pre-launch access to new and limited-edition products and events by invitation – and more! All this when you spend $1200 AUD per year (12 months).

Level 4: Aus$3,500.000+ spend per year: As a Beauty Connoisseur, your passion for beauty is unmatched. You would go to the ends of the earth for beauty’s most coveted (as would we!). As our most beauty-obsessed members, you can expect our most exciting, luxurious rewards. You will receive nine rewards each year, including Beauty Loop Boxes (a curation of special samples) and Beauty Loop Bonuses (extra beauty products we just need to share). Plus, one complimentary makeup application, pre-launch access to new and limited-edition products, access to exclusive invitation-only events, and of course, a birthday gift from us to you with love. All this and more when you spend $3,500 AUD per year (12 months).

Although the Murdoch press in April 2025 published a long critique of the scheme (their "inside information" obtained on this occasion without having to resort to phone hacking), Beauty Loop remains popular, said now to enjoy a membership in excess of 4½ million Beauty Discoverers, Devotees, Aficionados & Connoisseurs (MECCA doesn’t publish a breakdown) but in 2023 there emerged on-line speculation there may be an exclusive, secret layer of the loop (presumably known as Level 5) for those who spend much more.  It all sounded quite Masonic and there was speculation at least some MECCA staff must know about the mysterious Level 5 but were not permitted to discuss it and, if asked, were instructed to deny the existence of such a thing.  What Level 5 Beauty Loop members would be called attracted speculation and the most popular suggestions were “Beauty Addict”, “Beauty Obsessive” & “Beauty Cultist”, the consensus being floor staff would be able to confirm the identity of Level 5 members by some unobvious and ambiguous flag in the MECCA database rather than something Masonic like a secret handshake.

Fueling the conspiratorial atmospherics, MECCA adopted the Pentagon's "neither confirm nor deny" policy (invoked usually when questioned about the existence of nuclear weapons in certain places) so the hunt for a MECCA "deep throat" began and in mid 2024 it was revealed one had been found (apparently called “Jillie” according to the Alex Hourigan and Sally McMullen, hosts of the podcast Two Broke Chicks)  What “Jillie” disclosed was the mystical “Level 5” really existed and it was an “exclusive, invitation-only” stratum atop the loop and it was called the “Magic Circle”.  While the exact metrics have never been confirmed by a reliable source, the implication was Magic Circle members received tailored gifts, exclusive access to events, and a deeper level of personalization from MECCA.  Quite how high one’s annual Mecca-spend need to be to enter (and presumably retain) one’s place in the Magic Circle isn’t known but the consensus among the MECCA congregation is it will be in excess of Aus$10,000.  The secret out, a MECCA representative did respond to media requests and issued a statement: “Through Magic Circle we provide personalised service and access to exclusive events and opportunities to a select group of our most passionate and loyal Level 4 customers.  Our Magic Circle customers are those who regularly shop with Mecca, engage with our team and are active members of our beauty-loving community.”  Now we know.

Curiously (and presumably coincidentally), the term “magic circle” was used of the mechanism by which a leader of the UK’s Conservative and Unionist (Tory) Party “emerged”, the system still in place as recently as 1963.  Tory Party leaders have been elected by a formal vote only since 1965 and even then, until 2001, it was only MPs who voted.  Prior to that, a leader was said to “emerge” from what was known as a “magic circle” and although never as mysterious as some suggested, it was an opaque process, conducted by party grandees.  The classic example was in 1957 when the choice was between Harold MacMillan (1894-1986; UK prime-minister 1957-1963) and Rab Butler (1902-1982).  To his office in the House of Lords, the lisping (fifth) Lord Salisbury (1983-1972) summoned those he thought good chaps (women at this point hadn’t yet become chaps) and asked “Hawold or Wab?”  Hawold prevailed.

The change in process in 1965 came about at the insistence of Sir Alec Douglas-Home (1903-1995 and the fourteenth Earl of Home before in 1963 disclaiming his peerage to become prime-minister (1963-1964)).  Since 1957, the country had changed and there was much criticism of the murky manner by which Sir Alec had become party leader with a clamour, even within the party, both to modernize and appear more transparently democratic.  From this point, unleashed were the forces which would in 1975 see Margaret Thatcher (1925-2013; UK prime-minister 1979-1990) elected leader but the first beneficiary of the wind of change was Edward "Ted" Heath (1916-2005; UK prime-minister 1970-1974), a grammar school boy who replaced the quondam fourteenth earl.  Notably, to appear more modern, Heath in 1965 didn't repair (as he had with MacMillan when he emerged in 1957), to the Turf Club for a celebratory meal of oysters, game pie and champagne which “…might have made people think a reactionary regime had been installed”.  

Lindsay Lohan’s daring display of naked belt loops; note the hooking of the thumbs (right).  A belt will usually include a loop next to the buckle, used to keep the end of the belt in place.  This is called the "keeper".

It can be hard now to understand quite what a change Heath's accession in 1965 flagged; the Tory Party previously had leaders from the middle class but never the lower middle class.  The significance of what emerged in 1965 was less the new leader than a changed Tory Party in a changed country.  Whether a more democratic process than the magic circle means much of a change in the character of the figure chosen seems doubtful because whatever happens, the extent of the variation probably is still something like that once described by Georges Clemenceau (1841–1929; Prime Minister of France 1906-1909 & 1917-1920) as the difference between: "a politician who would murder their own mother and one prepared to murder only someone else's mother".  Nor has the change in process likely to have discouraged those anxious to make it to the top of the “greasy pole”.  When the office beckoned Lord Melbourne (1779-1848; UK prime-minister 1834 & 1835-1841), he was disinclined to accept, fearing it would be “…a damned bore” but his secretary persuaded him, saying “…no Greek or Roman ever held the office and if it lasts but three months it’ll still be worthwhile to have been Prime Minister of England”.  That thought remains to console Liz Truss (b 1975; UK prime-minister Sep-Oct 2022) who, despite it all, can still remember and be glad.