as in genius
a very smart person
a techie who always has to have the latest gadget that the brainiacs in Silicon Valley have cooked up
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Recent Examples of brainiac
There’s something rare about Swain, who is a young brainiac, but one who has built his business the old-fashioned, pre-quant-trading and Excel models Wall Street way, via charm offensives that weave webs of tight relationships few rivals can match.
—
Shawn Tully, Fortune, 1 Nov. 2025
There’s no way of knowing who’s the brainiac in the Swift brood, but one Norwegian study showed the oldest child has an IQ that averages three points higher than that of the second oldest, while the second child, in turn, is one point smarter than the third.
—Jeffrey Kluger, Time, 3 Oct. 2025
In addition to the Ivy League brainiacs, Chen employs an army of a million-plus gig workers from more than 50 countries around the world who help come up with questions that might stump AI, evaluating the models’ responses and writing criteria that help AI generate a perfect response.
—Danielle Chemtob, Forbes.com, 17 Sep. 2025
Both are wicked smart brainiacs on a tireless quest to do good in the world.
—Natasha Stoynoff, PEOPLE, 7 Sep. 2025
See All Example Sentences for brainiac
Shawn Tully, Fortune, 1 Nov. 2025
There’s no way of knowing who’s the brainiac in the Swift brood, but one Norwegian study showed the oldest child has an IQ that averages three points higher than that of the second oldest, while the second child, in turn, is one point smarter than the third.
—Jeffrey Kluger, Time, 3 Oct. 2025
In addition to the Ivy League brainiacs, Chen employs an army of a million-plus gig workers from more than 50 countries around the world who help come up with questions that might stump AI, evaluating the models’ responses and writing criteria that help AI generate a perfect response.
—Danielle Chemtob, Forbes.com, 17 Sep. 2025
Both are wicked smart brainiacs on a tireless quest to do good in the world.
—Natasha Stoynoff, PEOPLE, 7 Sep. 2025
See All Example Sentences for brainiac
Recent Examples of Synonyms for brainiac
Noun
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The federal government got out of the housing business – through cuts to the Department of Housing and Urban Development – and left people’s housing needs to be met by what another Reagan official called the genius of the private market.—
John Blake,
CNN Money,
22 Mar. 2026
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In her documentary debut, Coppola aims to captures the genius and singular universe of the iconic American designer and her close friend.—
Jill Goldsmith,
Deadline,
20 Mar. 2026
Noun
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This one just happens to involve wizards, goblins, and one savage, half-blind dragon.—
Séamas O'Reilly,
Vulture,
26 Mar. 2026
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Potterheads across the globe will instantly recognize Harry’s not-so-homely house on Privet Drive, his cramped excuse of a bedroom and the endless disdain oozing from the young wizard’s unloving aunt and uncle, Petunia and Vernon Dursley.—
Charlotte Reck,
CNN Money,
26 Mar. 2026
Noun
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Needless to say, so is every music nerd on the internet considering the band’s most recent album of experimental glitch rap, Year of the Snitch, came out way back in 2018.—
Nina Corcoran,
Pitchfork,
23 Mar. 2026
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But 15-year-old high school speech and debate nerds would catch it right away.—
Edward Lotterman,
Twin Cities,
22 Mar. 2026
Noun
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Welniak has been able to pick her brain about pitching.—
Jeff Vorva,
Chicago Tribune,
26 Mar. 2026
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People in their teens and early 20s are considered to be at greater risk for this type of rare but serious bacterial infection called meningococcal group B that can lead to meningitis, an inflammation in the membranes that cover the spinal cord and brain.—
Kathleen Felton,
Washington Post,
25 Mar. 2026
Cite this Entry
“Brainiac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/brainiac. Accessed 29 Mar. 2026.
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