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
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of brainiac
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
The Scooby gang needs its brainiac (who also knows how to rock a mod pair of specs).
—Maureen Lee Lenker, EW.com, 28 Mar. 2025
Because bonobos are brainiacs, pinpointing the cup with the treat should have been no sweat.
—Jack Tamisiea, Scientific American, 3 Feb. 2025
Hollis enrolled him at Terra Environmental Research Institute, a magnet school for science, tech and engineering brainiacs.
—Carol Marbin Miller, Miami Herald, 2 Jan. 2025
See All Example Sentences for brainiac
Elizabeth Hernandez, Denver Post, 28 May 2025
The Scooby gang needs its brainiac (who also knows how to rock a mod pair of specs).
—Maureen Lee Lenker, EW.com, 28 Mar. 2025
Because bonobos are brainiacs, pinpointing the cup with the treat should have been no sweat.
—Jack Tamisiea, Scientific American, 3 Feb. 2025
Hollis enrolled him at Terra Environmental Research Institute, a magnet school for science, tech and engineering brainiacs.
—Carol Marbin Miller, Miami Herald, 2 Jan. 2025
See All Example Sentences for brainiac
Recent Examples of Synonyms for brainiac
Noun
-
The most famous of these works, Doctor Faustus, is about the glories and perils of eccentric genius.—
Isaac Butler,
The Atlantic,
3 Nov. 2025
-
These insightful discussions will bring together the creative geniuses behind some of the most buzzworthy shows of the season.—
Whitney Cinkala,
Variety,
31 Oct. 2025
Noun
-
But there are many other threats out there, like the evil wizard Vilgefortz (Mahesh Jadu) who attacks Yennefer’s forces in the climactic Battle of Montecalvo.—
Jordan Moreau,
Variety,
31 Oct. 2025
-
As the unloved surviving son of a cruel father, he was approached by a wizard who offered him gold to secretly feed a mysterious hedgehog-faced monster in a cave.—
Scott Meslow,
Vulture,
30 Oct. 2025
Noun
-
Roberts’s pet theory is the Major Questions Doctrine, known to Supreme Court nerds as MQD.—
Noah Feldman,
Twin Cities,
6 Nov. 2025
-
Military history nerds will be pleased.—
Daniel Fienberg,
HollywoodReporter,
6 Nov. 2025
Noun
-
The brain can’t effectively be both at the same time.—
Literary Hub,
Literary Hub,
5 Nov. 2025
-
Until now brain rot has been more of a casual observation than something backed by hard evidence.—
Greg Rosalsky,
NPR,
4 Nov. 2025
Cite this Entry
“Brainiac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/brainiac. Accessed 9 Nov. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share