What does the word whirl mean?

Usage examples for whirl

  1. His brain was in a whirl. – Mysterious Mr. Sabin by E. Phillips Oppenheim
  2. I forgot the whirl of the night before and of the evening to come, and I was the child Daisy again, I think, in very much. – Daisy in the Field by Elizabeth Wetherell
  3. Miss Mapp's head was in a whirl. – Miss Mapp by Edward Frederic Benson