ultrarich

Short definition from Wiktionary

Adjective

1. 1
   Extremely rich; very wealthy
2. 2
   Extremely rich in flavor; very sweet, fatty, or intensely flavorful.
3. 3
   Extremely bold and vivid.
4. 4
   Extremely thick, smooth, and creamy with a high fat content.
5. 5
   Unusually full of desired resources, abounding.
6. 6
   Composed of extremely costly materials; very luxurious.

Noun

1. 1
   The wealthiest class of people.