cyclone

noun

1. (broad sense) A weather phenomenon consisting of a system of winds rotating around a center of low atmospheric pressure

2. (narrow sense) Such weather phenomenon occurring in the South Pacific and Indian Ocean

3. A low pressure system.

4. The more or less violent, small-scale circulations such as tornadoes, waterspouts, and dust devils.

5. A strong wind.

6. A cyclone separator; the cylindrical vortex tube within such a separator