Definition of "Spiral" :

noun: flying downward in a helical path with a large radius

noun: a structure consisting of something wound in a continuous series of loops

noun: ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center

noun: a continuously accelerating change in the economy

noun: a plane curve traced by a point circling about the center but at increasing distances from the center

noun: a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle

verb: to wind or move in a spiral course

verb: move in a spiral or zigzag course

verb: form a spiral

"The path spirals up the mountain."

adjective: in the shape of a coil