Dictionary.com
Thesaurus.com
Synonyms

brainy

American  
[bray-nee] / ˈbreɪ ni /

adjective

Informal.
  • brainier,
    comparative
  • brainiest
    superlative
  1. intelligent; clever; intellectual.


brainy British  
/ ˈbreɪnɪ /

adjective

  1. informal clever; intelligent

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Adjectives

Etymology

Origin of brainy

First recorded in 1835–45; brain + -y 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Yudkowsky’s acolytes grew into the rationalist movement, a group of brainy, often libertarian-leaning outsiders who revel in logical debate.

From The Wall Street Journal ● Jul. 12, 2026

In a World Cup where the boffins with their big brainy heads and their super computers are working overtime on who might play who in the last 32, there are other calculations worth conjuring with.

From BBC ● Jun. 21, 2026

While corvids and parrots are unquestionably brainy, they flounder with some cognitive tasks.

From The Wall Street Journal ● May 22, 2026

But the opportunity to mentor Tien — a rising 20-year-old American with a brainy game and similar background — proved intriguing.

From Los Angeles Times ● Mar. 10, 2026

In Hawaii, Barack’s intense and brainy side receded somewhat, while the laid-back part of him flourished.

From "Becoming" by Michelle Obama

“Midnight Suns” comes from 2K Games’ Firaxis studio, known for brainier challenges like “Civilization” and “XCOM.”

From Seattle Times ● Nov. 28, 2022

Though they lack nerve cells, sponges have some of the same specialized genes for synapses that brainier creatures possess, studies have shown.

From Science Magazine ● Nov. 3, 2021

Even you acknowledge this when the live studio audience doesn't laugh at one of your brainier opening punchlines.

From Salon ● Sep. 30, 2021

"It is gonna be a no brainier," Hong said.

From Reuters ● Sep. 13, 2021

It knew none of the games that the magpie invented save one, and that was a kind of aerial "peep-bo" to which the brainier bird lured it by means of a prize.

From My Tropic Isle by E. J. (Edmund James) Banfield

"We now know that some of the brainiest people around have or had dyslexia, including Einstein!" he told BookTrust in 2020.

From BBC ● Dec. 8, 2023

Share your score with friends and compete to see who’s the brainiest.

From Slate ● Jun. 12, 2023

The brainiest organization in baseball suddenly looks like the most foolish.

From Los Angeles Times ● Oct. 18, 2021

“Rick and Morty” is one of the funniest, brainiest, and most philosophically dense comedies on TV, let alone on Adult Swim.

From Salon ● Nov. 8, 2019

As much money as Hamp has made, and still makes, he would be broke today if his money and his business weren’t handled by Gladys, who is one of the brainiest women I ever met.

From "The Autobiography of Malcolm X" by Alex Malcolm X;Hailey

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training