Brainiac definition

brānē-ăk
Frequency:
(slang) A person of great intelligence.
noun
3
1
A person who is highly intelligent.
noun
3
2
(slang, sometimes derogatory) A very intelligent and usually studious, erudite person.
noun
1
0
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Other Word Forms

Noun

Singular:
brainiac
Plural:
brainiacs

Origin of brainiac

  • Probably from Brainiac a highly intelligent villain in DC Comics blend of brain and maniac

    From American Heritage Dictionary of the English Language, 5th Edition

  • Blend of brain and maniac coined in the Superman comic book. The term first appeared in Action Comics #438 in July, 1958. The word itself is a portmanteau of the words brain and maniac, with influence from ENIAC, the name of an early computer.

    From Wiktionary