bonanza
Americannoun
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a rich mass of ore, as found in mining.
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a source of great and sudden wealth or luck; a spectacular windfall.
The play proved to be a bonanza for its lucky backers.
noun
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a source, usually sudden and unexpected, of luck or wealth
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a mine or vein rich in ore
Etymology
Origin of bonanza
An Americanism first recorded in 1835–45; from Spanish: “calm sea, prosperity, abundance of minerals,” nasalized variant of Medieval Latin bonacia, alteration (with influence from Latin bonus “good,” possibly to avoid confusion with malus “bad”) of Latin malacia “calm sea,” from Greek malakía “softness” ( malak(ós) “soft” + -ia -ia )
Explanation
An unexpected increase in tourism to a small town could be a bonanza for the locals. Bonanza means "a sudden opportunity to make money." Bonanza is a noun that means "a sudden rush of wealth or good fortune," but in a more scientific sense it means "a rich source of a precious metal." So, if you happen to strike gold in your backyard, that would be a bonanza on both fronts. "Boom towns" that sprung up during the California Gold Rush were created by a bonanza. More casually, bonanza can mean something like "a big to-do," or an extravaganza.
Vocabulary lists containing bonanza
The Omnivore's Dilemma
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Butterfly Yellow
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Killers of the Flower Moon
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The record number followed a bonanza year for Gotham’s investment banking powerhouses, though it fell well short of the city’s projections.
From The Wall Street Journal • Apr. 1, 2026
They reflect a cutthroat competition occurring between weight-loss drugmakers in the US, as they look to capitalise on a potential sales bonanza in the country, where the obesity rate among adults is roughly 40%.
From BBC • Mar. 23, 2026
From an investment perspective, West said that independent power producers will be major winners of the Texas data-center bonanza.
From MarketWatch • Mar. 12, 2026
Some 90,000 fans have flocked to the Bay Area, which is expected to receive a $500 million economic boost from the sports bonanza.
From Barron's • Feb. 8, 2026
Langley, full of talented people with varied interests, was a bonanza of recruits for her many volunteer activities.
From "Hidden Figures" by Margot Lee Shetterly
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
