Dictionary
bo•nan•za
Pronunciation: (bu-nan'zu, bō-), [key]—
n.
1. a rich mass of ore, as found in mining.
2. a source of great and sudden wealth or luck; a spectacular windfall:
The play proved to be a bonanza for its lucky backers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.