1. (陆地或海洋上的)旋风，旋流
A whirlwind is a tall column of air which spins round and round very fast and moves across the land or sea.

2. 一连串的突发事件
You can describe a situation in which a lot of things happen very quickly and are very difficult for someone to control as a whirlwind .

3. 旋风般的;匆匆忙忙的;快速的
A whirlwind event or action happens or is done much more quickly than normal.

1. a more or less vertical column of air whirling around itself as it moves over the surface of the Earth