a.

1. 騷動的，騷亂的；動蕩的；混亂的
   a turbulent period of history

   動蕩的歷史時期

2. 洶湧的；狂暴的
3. 【氣】湍流的

adj.

1. disorderly or confused; not calm or stable.
2. technical relating to or denoting irregular and disordered flow of fluids.