loop¹ (lōōp)

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

noun 

1. 1. A length of line, thread, ribbon, or other thin material that is curved or doubled over making an opening.
   2. 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. Computer Science A sequence of instructions that repeats either a specified number of times or until a particular condition is met.
5. A type of 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

verb: looped, loop·ing, loops. 

transitive verb 

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 sound track.

intransitive verb 

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.

idioms

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 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.

loop² (lōōp)

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[Middle English loupeMiddle Dutch lūpen, to lie in wait, peer.]

noun 

A loophole through which small arms may be fired.

Loop (lōōp)

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The central business district of Chicago, Illinois. The Loop was originally named for a loop in the elevated railroad tracks.

league¹ (lēg)

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[Alteration (influenced by Italian lega), of Middle English liege, from Old French ligue, from Medieval Latin liga, and from Old Italian lega, liga (from legare, to bind), both from Latin ligāre, to bind.]

noun 

1. An association of states, organizations, or individuals for common action; an alliance.
2. Sports An association of teams or clubs that compete chiefly among themselves. Also called loop¹
3. A class or level of competition: The ski jump was out of his league.

verb: leagued, leagu·ing, leagues. 

intransitive verb 

To come together in or as if in a league.

transitive verb 

To bring together in or as if in a league.