loop

Definitions

• 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 ring road or beltway.
• An endless strip of tape or film allowing continuous repetition.
• A complete circuit for an electric current.
• (programming) A programmed sequence of instructions that is repeated until or while a particular condition is satisfied.
• (graph theory) An edge that begins and ends on the same vertex.
• (topology) A path that starts and ends at the same point.
• (transportation) A bus or rail route, walking route, etc. that starts and ends at the same point.
• (rail) A place at a terminus where trains or trams can turn round and go back the other way without having to reverse; a , turning loop, or reversing loop.
• (algebra) 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.
• (alternative form of) loup (mass of iron).
• (biochemistry) A flexible region in a protein's secondary structure.