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 et al).

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 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 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).

Beauty Loop is a popular scheme, 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 was 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 seems to have 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" continues.  

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".