Definition of "bonanza" []

• A rich mine, vein, or pocket of ore. (noun)
• A source of great wealth or prosperity. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But investment banks may not land a profit bonanza from the wave of deals; so many banks are sharing top billing, big profits for bookrunners remain to be seen."
• "The promised hydrocarbon bonanza is already manifesting itself in territorial claims - such as between Canada and Greenland over tiny Hans Island or Russia's act of planting a titanium flag underwater on the Lomonosov ridge to stake a claim on a huge exclusive economic zone."
• ""That long-held empirical value of pi, I am not saying it should be necessarily viewed as wrong, but 3 is a lot better," said Roby, the 34-year old legislator representing Alabama's second congressional district, ushered into office in the historic 2010 Republican mid-term bonanza."