An Encylopedia Britannica Company

July 22, 2016 Word of the Day

brainiac /ˈbreɪniˌæk/ noun
brainiac
/ˈbreɪniˌæk/
noun

plural brainiacs

Two brainiacs in a lab
Two brainiacs in a lab
Definition of BRAINIAC

[count] informal

: a very intelligent person

  • the class brainiac

— often used before another noun

  • a brainiac scientist

More Words of the Day