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loop 1

a. A length of line, thread, ribbon, or other thin material that is curved or doubled over making an opening.
b. The opening formed by such a doubled line.
2. Something having a shape, order, or path of motion that is circular or curved over on itself.
3. Electricity A closed circuit.
4. Computers A sequence of instructions that repeats either a specified number of times or until a particular condition is met.
5. A loop-shaped intrauterine device.
6. A flight maneuver in which an aircraft flies a circular path in a vertical plane with the lateral axis of the aircraft remaining horizontal.
7. A segment of film or magnetic tape whose ends are joined, making a strip that can be continuously replayed.
8. Sports See league1.
v. looped, loop·ing, loops
1. To form into a loop.
2. To fasten, join, or encircle with loops or a loop.
3. To fly (an aircraft) in a loop.
4. To move in a loop or an arc.
5. Electricity To join (conductors) so as to complete a circuit.
6. To add or substitute (words) in a film by altering the soundtrack.
1. To form a loop.
2. To move in a loop: "The couple looped constantly around the international social circuit" (Walter Isaacson).
3. To make a loop in an aircraft.
Phrasal Verb:
loop in
To provide up-to-date information; inform: She sent an email to loop in the staff about policy changes. Before proceeding with my plan, I looped my colleagues in.
in the loop
Part of a group that is kept up-to-date with information about something: knew about the merger because she's in the loop.
knock/throw for a loop
Slang To surprise tremendously; astonish.
out of the loop
Not part of a group that is kept up-to-date with information about something.

[Middle English loupe, probably from Middle Irish lúb (perhaps influenced by Middle English lep, basket).]

loop 2

n. Archaic
A loophole through which small arms may be fired.

[Middle English loupe; akin to Middle Dutch lūpen, to lie in wait, peer.]


The central business district of Chicago, Illinois. Used with the.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.looping - (computer science) executing the same set of instructions a given number of times or until a specified result is obtainedlooping - (computer science) executing the same set of instructions a given number of times or until a specified result is obtained; "the solution is obtained by iteration"
physical process, process - a sustained phenomenon or one marked by gradual changes through a series of states; "events now in process"; "the process of calcification begins later for boys than for girls"
computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures
References in periodicals archive ?
Abstract: Looping is the practice in which a teacher instructs the same group of students for at least two school years, following them from one grade level to the next.
Looping has been employed in education for some time.
To find out, take a closer look at the physics of looping.
Vertical looping is all about inertia and acceleration," explains Jeff Pike, a design engineer at Great Coasters International in Sunbury, Penn.
But while the show was too small to thoroughly survey current practices of looping and too general to advance an argument of its own, ultimately it provided a welcome introduction.
Magnetic fields carpet the region just above the sun's surface, with some magnetic field lines looping out into space and others looping back in toward the sun.
The man standing next to me suddenly interrupts my terrified thoughts by saying, "It's the world's first suspended, outside looping roller coaster.