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 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
The two brainiacs representing Colorado at the Scripps National Spelling Bee outside Washington, D.C., this week advanced through the first three rounds of the competition Tuesday.
—Elizabeth Hernandez, Denver Post, 28 May 2025
See All Example Sentences for brainiac
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
The two brainiacs representing Colorado at the Scripps National Spelling Bee outside Washington, D.C., this week advanced through the first three rounds of the competition Tuesday.
—Elizabeth Hernandez, Denver Post, 28 May 2025
See All Example Sentences for brainiac
Recent Examples of Synonyms for brainiac
Noun
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Tom Hulce is daffy and delicious as the airhead prodigy Mozart, but few of us can identify with that kind of genius.—
Devan Coggan,
Entertainment Weekly,
15 Mar. 2026
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Her recent work on designing a brand identity for her own Photography practice is a perfect example of her genius across disciplines.—
Heide Janssen,
Oc Register,
15 Mar. 2026
Noun
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In this movie, Sophie meets a powerful wizard named Howl, who lives in a magical moving castle.—
BestReviews,
Mercury News,
9 Mar. 2026
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Radcliffe played the titular wizard Harry Potter in the beloved franchise, while Felton portrayed Potter's nemesis Draco Malfoy.—
Yi-Jin Yu,
ABC News,
6 Mar. 2026
Noun
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And while the series typically involves a meal, given Puth’s legendary music nerd-dom, the singer instead took to the piano at the club and showed interviewer Tomás Mier how the songs came together and what his intentions were on the most personal collection he’s released to date.—
Gil Kaufman,
Billboard,
19 Mar. 2026
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There was even that party where Rick Ross had to fend off an army of crypto nerds who were trying to scale the stage.—
Clara Molot,
Vanity Fair,
17 Mar. 2026
Noun
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The team is developing a neuroadaptive control system that allows robots to pick up on signals from the human brain and adjust their actions instantly.—
Neetika Walter,
Interesting Engineering,
19 Mar. 2026
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Yet Grace is the one who wakes up in space, and this story emerges nonlinearly, narrative flashbacks like bursts of memory ripping through his brain, discombobulated after a long intergalactic coma.—
Katie Walsh,
Boston Herald,
19 Mar. 2026
Cite this Entry
“Brainiac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/brainiac. Accessed 20 Mar. 2026.
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