brain·​i·​ac | \ ˈbrā-nē-ˌak How to pronounce brainiac (audio) \

Definition of brainiac

: a very intelligent person

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Did You Know?

As Superman fans know, "Brainiac" was the superintelligent villain in the Action Comics series and its spin-offs. You don't need x-ray vision to see the connection here - etymologists think Superman's brainy adversary was probably the inspiration for our term "brainiac." We didn't coin the term right away though. The comic-book series was launched in 1938, and the general use of "brainiac" was first recorded in print in 1982.

Examples of brainiac in a Sentence

a techie who always has to have the latest gadget that the brainiacs in Silicon Valley have cooked up
Recent Examples on the Web But again, there’s probably a whole load more business decisions and brainiac ideas that will probably help that idea flourish. Rebecca Alter, Vulture, "Drag Race U.K.’s Lawrence Chaney’s Up in This Gig," 22 Mar. 2021 Familiar tropes get a raucous refresh when an underdog brainiac teams up with misfit dancers to pop-and-lock like a champ. Brian Truitt, USA TODAY, "Need a holiday escape? 100 entertaining movies from 2020 you still have time to stream," 21 Dec. 2020 Meanwhile there’s a new bad guy to reckon with: Merrick (Harry Melling), a bratty brainiac who likes to refer to himself as the youngest billionaire in pharma. Bill Goodykoontz, The Arizona Republic, "Charlize Theron is a tough and moody superhero in Netflix action drama 'The Old Guard'," 8 July 2020 Among the many impressive and articulate brainiacs featured here, Orlowski's one-time contemporary at Stanford, Tristan Harris, grabs the lion's share of the screen time. Leslie Felperin, The Hollywood Reporter, "'The Social Dilemma': Film Review | Sundance 2020," 27 Jan. 2020 But the Stallman affair touches on something else: a simmering resentment of the treatment of women by the scruffy brainiacs who built our digital world, as well as the Brahmins of academia and business who benefited from the hackers’ effort. Wired, "Richard Stallman and the Fall of the Clueless Nerd," 18 Sep. 2019 And now one of those receivers will be Stills, a brainiac who can align anywhere and read defenses while running routes. Andy Benoit,, "An Early Glimpse Into the Rodgers-LaFleur Marriage in Green Bay," 4 Sep. 2019 Just the title was about the highest brainiac accolade that could be conferred., "The hard-charging space program: Breakthroughs, breakdowns and breakneck," 27 June 2019 Just the title was about the highest brainiac accolade that could be conferred., "The hard-charging space program: Breakthroughs, breakdowns and breakneck," 27 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'brainiac.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of brainiac

1975, in the meaning defined above

History and Etymology for brainiac

probably from Brainiac, superintelligent villain in the Superman comic-book series

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Time Traveler for brainiac

Time Traveler

The first known use of brainiac was in 1975

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Statistics for brainiac

Last Updated

6 Apr 2021

Cite this Entry

“Brainiac.” Dictionary, Merriam-Webster, Accessed 12 May. 2021.

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English Language Learners Definition of brainiac

informal : a very intelligent person

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