cyclone

noun

1. 1

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

2. 2

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

3. 3

   A low pressure system.

4. 4

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

5. 5

   A strong wind.

6. 6

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