to move, or make somebody/something move, around quickly in a circle or in a particular direction

if your mind, thoughts, etc. whirl, you feel confused and excited and cannot think clearly

I couldn't sleep—my mind was whirling from all that had happened.

So many thoughts whirled around in her mind.

a movement of something turning round and round

a number of activities or events happening one after the other

Her life was one long whirl of parties.

It's easy to get caught up in the social whirl.

The next few hours passed by in a whirl of activity.

LEARNit Dictionary