Definition of "dizzily"

I looked dizzily, and beheld a wide expanse of ocean, whose waters wore so inky a hue as to bring at once to my mind the Nubian geographer's account of the Mare Tenebrarum.

1841, Edgar Allan Poe, A Descent into the Maelström‎

The Australians had seen it coming—Singapore's fall and the inevitable sequel, the Japanese air attack on the Australian mainland […] . But it had happened dizzily fast.

1942 March 2, “Feeling the Crunch”, in Time

The Lord President can not avoid our pointing out that the Government's position has shifted dizzily from point to point during these debates.

1977, Hansard, Scotland and Wales Bill, 15 February, 1977