(initial capital letter) I have found (it): the reputed exclamation of Archimedes when, after long study, he discovered a method of detecting the amount of alloy mixed with the gold in the crown of the king of Syracuse.
(used as an exclamation of triumph at a discovery.)
1560–70; < Greek heúrēka, 1st person singular perfect indicative of heurískein to find, discover
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Bourla has also taken steps that prevent eureka moments from being completely siloed.
From The Wall Street Journal ● Oct. 9, 2026
His eureka moment came nearly four years ago, when ChatGPT was made available to the public on Nov. 30, 2022.
From MarketWatch ● Aug. 20, 2026
“We’ve heard of ‘eureka’ and, yes, there was this eureka moment,” he recalled.
From Los Angeles Times ● Jul. 17, 2026
I think my first eureka moment was when I was traveling in sub-Saharan Africa on the Ivory Coast doing a site visit.
From Barron's ● Mar. 5, 2026
Hudson leans in, puts his fist underneath his chin, and stares off into the sky like he’s just had the most epic eureka moment and is now ready to remake the world.
From "What If It's Us" by Becky Albertalli and Adam Silvera
One of the main varieties is called Eureka Sunrise, a breed with large, sweet berries developed by Australian company Mountain Blue.
From The Wall Street Journal ● Sep. 15, 2026
The Port of Long Beach is one of only two areas primed for the assembly work; the other is Humboldt Harbor near Eureka.
From Los Angeles Times ● May 24, 2026
More recently, he founded an AI education company called Eureka Labs External link.
From Barron's ● May 19, 2026
The Yemeni coastguard earlier said the tanker MT Eureka had been hijacked and was headed towards Somalia.
From BBC ● May 2, 2026
And yes, again the Eureka washed over him, the yes-yes-yes of it.
From "An Abundance of Katherines" by John Green
What was a Eureka! moment in your life — in France, in Denmark, or in La Paz?
From Salon ● May 4, 2019
But the theory was not born, fully formed, in some Eureka! moment.
From Scientific American ● Nov. 12, 2015
We’ve concocted this image for ourselves of inspiration being a sudden Eureka! moment, with a lightbulb appearing over our heads.
From Forbes ● May 30, 2014
But at Eureka! we think we've done just that: our play-based approach with its emphasis on immersive, tactile and themed experiences has never been more popular, as evidenced by our steadily increasing visitor numbers.
From The Guardian ● Jun. 27, 2013
"Eureka!" exclaimed Bolton, his face beaming with exultation.
From The Young Bank Messenger by Horatio Alger
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
