Noun

1. A plane curve traced by a point circling about the center but at increasing distances from the center
2. A curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
3. A continuously accelerating change in the economy
4. Ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center
5. A structure consisting of something wound in a continuous series of loops
6. Flying downward in a helical path with a large radius

Verb

1. To wind or move in a spiral course
2. Form a spiral
3. Move in a spiral or zigzag course