In mining an abundant mine or vein of gold or gold hence anything that will be a mine of wide range or yields a sizable income
- an especially wealthy vein of valuable ore
- a sudden occurring that brings fortune (as an abrupt opportunity to generate income)
- In mining, a rich my own or vein of gold or gold; ergo, any such thing which can be a mine of wealth or yields a sizable earnings.
1844, American English, from Spanish bonanza "an abundant lode," initially "fair-weather at water, success," from Vulgar Latin *bonacia, from Latin bonus "good" (see bene-).
(letter.) In mining, an abundant mine or vein of silver or gold; ergo, everything which can be a mine of wealth or yields a big income.
This was followed by a reaction and a general collapse of inflated values until 1873, when the discovery of the Great Bonanza mine brought about a revival of industry and of speculation.