loop

Pronunciation: /luːp/

The English word “loop” has 20 meanings listed here.

noun

A length of thread, line or rope that is doubled over to make an opening.
The opening so formed.
A shape produced by a curve that bends around and crosses itself.
A process that returns to its beginning and then repeats itself in the same sequence.
A ring road or beltway.
An endless strip of tape or film allowing continuous repetition.
A complete circuit for an electric current.
A programmed sequence of instructions that is repeated until or while a particular condition is satisfied.
An edge that begins and ends on the same vertex.
A path that starts and ends at the same point.
A bus or rail route, walking route, etc. that starts and ends at the same point.
A place at a terminus where trains or trams can turn round and go back the other way without having to reverse; a balloon loop, turning loop, or reversing loop.
A passing loop.
A quasigroup with an identity element.
A loop-shaped intrauterine device.
An aerobatic maneuver in which an aircraft flies a circular path in a vertical plane.
A small, narrow opening; a loophole.
A flexible region in a protein's secondary structure.
A sports league
The curved path of the ball bowled by a spin bowler.

Etymology

From Middle English loupe (“noose, loop”), earlier lowp-knot (“loop-knot”), of North Germanic origin, from Old Norse hlaup (“a run”), used in the sense of a "running knot", from hlaupa (“to leap”), ultimately from Proto-Germanic *hlaupaną (“to leap, run”). Compare Swedish löp-knut (“loop-knot”), Danish løb-knude (“a running knot”), Danish løb (“a course”). More at leap. The verb is derived from…

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.