1. To move around a central point while getting closer or farther away from it: "Smoke was spiraling up from the chimney of the house."

"The airplane spiraled down from the sky and onto the ground where it was shattered into pieces."

2. To increase, to decrease, or to get worse in a continuous and a fast and uncontrolled process: "The unemployment rate has been spiraling higher while the stock market has been spiraling lower."