Noun

1. Fastener consisting of a metal ring for lining a small hole to permit the attachment of cords or lines
2. Anything with a round or oval shape (formed by a curve that is closed and does not intersect itself)
3. (computer science) a single execution of a set of instructions that are to be repeated
4. An inner circle of advisors (especially under president reagan)
5. The basic pattern of the human fingerprint
6. A computer program that performs a series of instructions repeatedly until some specified condition is satisfied
7. The topology of a network whose components are serially connected in such a way that the last component is connected to the first component
8. An intrauterine device in the shape of a loop
9. A complete electrical circuit around which current flows or a signal circulates
10. A flight maneuver; aircraft flies a complete circle in the vertical plane

Verb

1. Move in loops
2. Make a loop in
3. Fly loops, perform a loop
4. Wind around something in coils or loops
5. Fasten or join with a loop