noun brain·i·ac \ˈbrā-nē-ˌak\

: a very intelligent person

Full Definition of BRAINIAC

:  a very intelligent person

Examples of BRAINIAC

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

Origin of BRAINIAC

probably from Brainiac, superintelligent villain in the Superman comic-book series
First Known Use: 1982


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