a temporary feeling that your sense of balance is not good and that you may fall down

The sight of blood may cause dizziness in some people. 看见血可能会引起一些人晕眩。

the quality of being confusing and very fast

The dizziness of the camerawork gives the scene a confusing quality. 令人头晕目眩的镜头运动营造出一种惶惑的场景。