vi.

1. 受引力作用而运动
2. 被吸引
   When he made his entrance, all the attention on the floor gravitated toward him.

   当他进场时，全场的注意力立即被他吸引。

3. 下沉；下降

v.

1. (usu. gravitate to/towards) be drawn towards a person or thing.
2. Physics  move, or tend to move, towards a centre of gravity.