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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Think space-saving packing solutions, genius tech that keeps your devices alive when outlets are scarce, and comfort items that make economy feel a little more bearable.—
Chaise Sanders,
Travel + Leisure,
3 May 2026
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Then there’s Reid, who is understood to be an offensive genius and has become the fourth-winningest coach in NFL history in large part because of his ability to adapt … But whose offense increasingly has felt somewhere between stale and predictable.—
Kansas City Star,
Kansas City Star,
2 May 2026
Noun
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The books also followed Harry on his mission to stop Lord Voldemort, a dark wizard who killed his parents and wants to rule both the wizard and Muggle (non-magical) world.—
Jason Pham,
StyleCaster,
1 May 2026
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Sure, young wizard Harry Potter and his pals, Hermione and Ron, can use their magical skills to defeat the forces of evil.—
Rob Hubbard,
Twin Cities,
30 Apr. 2026
Noun
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He's helped by Piggy (David McKenna), the prototypical nerd with asthma and an unfortunate nickname, but one of the only boys thinking of the practicalities of their survival.—
Kelly Lawler,
USA Today,
4 May 2026
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But the technical review seems to go well, nerd-to-nerd.—
Neil Senturia,
San Diego Union-Tribune,
4 May 2026
Noun
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Why robots struggled before this AI brain Robots have lacked usable training data for physical tasks.—
Kurt Knutsson,
FOXNews.com,
6 May 2026
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New randomized trials are finally testing what the powder actually does in female bodies, including during perimenopause and menopause, when muscle, bone and brain function all shift at once.—
Allison Palmer,
Fort Worth Star-Telegram,
6 May 2026
Cite this Entry
“Brainiac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/brainiac. Accessed 9 May. 2026.
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