- The definition of a bonanza is a big mineral deposit, an abundance of something desirable or a situation where there is a sudden increase in something desirable.
An example of a bonanza is when sales suddenly start taking off, greatly increasing the company's profits.
bonanza definition by Webster's New World
- a very rich vein or pocket of ore
- any source of great wealth or profits
Origin: Spanish fair weather, prosperity ; from Vulgar Latin an unverified form bonacia, ; from Classical Latin bonus, good (see bonus), after malacia, calm at sea (assumed to be ; from malus, bad) ; from Classical Greek malakia ; from malakos, soft, akin to mylē, mill
bonanza definition by American Heritage Dictionary
- A rich mine, vein, or pocket of ore.
- A source of great wealth or prosperity.
Origin: Spanish, from Medieval Latin bonacia, calm sea, blend of Latin bonus, good; see deu-2 in Indo-European roots, and Medieval Latin malacia, calm sea (from Greek malakiā, from malakos, soft; see mel-1 in Indo-European roots).