spiral (Noun) — A plane curve traced by a point circling about the centre but at increasing distances from the centre.
spiral (Noun) — A curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle.
spiral (Noun) — A continuously accelerating change in the economy.
spiral (Noun) — Ornament consisting of a curve on a plane that winds around a centre with an increasing distance from the centre.
spiral (Noun) — A structure consisting of something wound in a continuous series of loops. ex. "a spiral of rope"
spiral (Noun) — Flying downward in a helical path with a large radius.
spiral (Verb) — To wind or move in a spiral course.
spiral (Verb) — Form a spiral. ex. "The path spirals up the mountain"
spiral (Verb) — Move in a spiral or zigzag course.
spiral (Adjective) — In the shape of a coil. ex. "A spiral spring is depicted by providing thickness to a helix"