Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

brainiac

play
noun brain·i·ac \ˈbrā-nē-ˌak\

Simple Definition of brainiac

  • : a very intelligent person

Source: Merriam-Webster's Learner's Dictionary

Full Definition of brainiac

  1. :  a very intelligent person

Examples of brainiac in a sentence

  1. <a techie who always has to have the latest gadget that the brainiacs in Silicon Valley have cooked up>



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.

Origin of brainiac

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


First Known Use: 1982


Learn More about brainiac


Seen and Heard

What made you want to look up brainiac? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

marked by grandiloquent style

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

reduce perplex disapprove soothe
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ