Loop

A mass of iron in a pasty condition gathered into a ball for the tilt hammer or rolls.

A fold or doubling of a thread, cord, rope, etc., through which another thread, cord, etc., can be passed, or which a hook can be hooked into; an eye, as of metal; a staple; a noose; a bight.

A small, narrow opening; a loophole.

A curve of any kind in the form of a loop.

A wire forming part of a main circuit and returning to the point from which it starts.

The portion of a vibrating string, air column, etc., between two nodes; -- called also ventral segment.

To make a loop of or in; to fasten with a loop or loops; -- often with up; as, to loop a string; to loop up a curtain.

a complete electrical circuit around which current flows or a signal circulates

a computer program that performs a series of instructions repeatedly until some specified condition is satisfied

(computer science) a single execution of a set of instructions that are to be repeated; "the solution took hundreds of iterations"