Definition from Wiktionary, the free dictionary
bonanza (plural bonanzas)
- In mining, a rich mine or vein of silver or gold.
- The point at which two mother lodes intersect
- By extension, anything which is a mine of wealth or yields a large income or return.
2013 August 31, Bagehot, “The parable of the Clyde”, The Economist, volume 408, number 8851:
- For two decades the bonanza on Scotland’s west coast continued. An occupation that had been seasonal and modestly profitable became year-round and lucrative. Baskets of herring put televisions into fishermen’s cottages and cars outside their doors. But fish, like oil and gas, with which Scotland’s continental shelf is also well-endowed, are not in unlimited supply.
- The popular show quickly became a ratings bonanza for the network.
point at which two mother lodes intersect
something that is a mine of wealth or yields a large income or return