diz|zy [ `dızi ] adjective
1. ) feeling as if you or the things around you are spinning, especially when you think you are going to fall:
I felt dizzy and had to sit down.
The dizzy spells (=periods when you feel dizzy) have stopped completely.
2. ) feeling or making you feel excited or confused, especially because everything is changing very fast:
the dizzy pace of modern life
We were dizzy with excitement.
3. ) INFORMAL silly, careless, and not interested in serious things
the dizzy heights (of something) HUMOROUS
an important or successful position. This is often used to show that the position is not really very impressive:
Now that you've reached the dizzy heights of assistant principal, I suppose you won't be talking to us anymore!
╾ diz|zi|ness noun uncount

Usage of the words and phrases in modern English. 2013.