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  1. Dictionary
    brainiac
    /ˈbreɪnɪak/

    noun

    • 1. an exceptionally intelligent person: informal North American "she's the original brainiac, a kid who completed high school at 14"

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    More definitions, origin and scrabble points

  2. www.merriam-webster.com › dictionary › brainiacBrainiac Definition & Meaning - Merriam-Webster

    : a very intelligent person. Did you know? As Superman fans know, Brainiac was the superintelligent villain in the Action Comics series and its spin-offs. His name is a portmanteau of brain and maniac.

  3. www.dictionary.com › browse › brainiacBRAINIAC Definition & Meaning | Dictionary.com

    Brainiac definition: a highly intelligent person.. See examples of BRAINIAC used in a sentence.

  4. www.vocabulary.com › dictionary › brainiacBrainiac - Definition, Meaning & Synonyms | Vocabulary.com

    someone who has exceptional intellectual ability and originality.

  5. www.collinsdictionary.com › dictionary › englishBRAINIAC definition and meaning | Collins English Dictionary

    Definition of 'brainiac' brainiac in British English. (ˈbreɪnɪˌæk ) noun. informal. a highly intelligent person. Collins English Dictionary. Copyright © HarperCollins Publishers. Word origin. C20: from a super-intelligent character in an American comic strip. Examples of 'brainiac' in a sentence. brainiac.

  6. en.wiktionary.org › wiki › brainiacbrainiac - Wiktionary, the free dictionary

    Jun 2, 2024 · brainiac (plural brainiacs) (slang, sometimes derogatory) A very intelligent and usually studious, erudite person. Synonyms: genius, pedant, smart-ass, wiseguy Antonyms: dufus, dumb-ass, dumbo, idiot, ignoramus

  7. www.oed.com › dictionary › brainiac_nbrainiac, n. & adj. meanings, etymology and more | Oxford English...

    A very intelligent person; an expert. Sometimes depreciative or derogatory, with connotations of social inadequacy or ostracization. 1975. The discussions..emphasized the spirited speech these pre-teenagers enjoy. They began to invent words and phrases to express themselves fully.

  8. www.oxfordlearnersdictionaries.com › english › brainiacbrainiac noun - Definition, pictures, pronunciation and usage...

    noun. /ˈbreɪniæk/ (North American English, informal) a very intelligent person. A team of brainiacs are here to answer your scientific questions. Brainiacs from around the world take part in the contest. Word Origin. Want to learn more?