Thesaurus

brainiac

noun

Synonyms & Antonyms of brainiac

a very smart person
  • a techie who always has to have the latest gadget that the brainiacs in Silicon Valley have cooked up

Synonyms for brainiac

Words Related to brainiac

Near Antonyms for brainiac

Antonyms for brainiac

See the Dictionary Definition 

Keep scrolling for more

Learn More about brainiac

Time Traveler for brainiac

Time Traveler

The first known use of brainiac was in 1975

See more words from the same year

Listen to Our Podcast about brainiac

Cite this Entry

“Brainiac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/brainiac. Accessed 20 Oct. 2020.

More from Merriam-Webster on brainiac

Dictionary: Definition of brainiac

Comments on brainiac

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

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

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

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!