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Synonyms

brainy

American  
[brey-nee] / ˈbreɪ ni /

adjective

Informal.
brainier, brainiest
  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

  • brainily adverb
  • braininess noun

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.

China’s advantage lies in the scale of its ambition, not only in the nation’s brainy tech hubs but also in areas such as Jingzhou, a city of five million people on the Yangtze River.

From The Wall Street Journal • Nov. 25, 2025

The former vice president’s steely resolve was captured years later in “Vice,” a 2018 biographical drama in which Christian Bale portrayed Cheney as a brainy yet uncompromisingly uncharismatic leader.

From Los Angeles Times • Nov. 4, 2025

Sir Stephen Fry lived up to his brainy reputation over breakfast, by predicting the chessboard was back: "I could be a knight - oh, I already am," he joked.

From BBC • Oct. 23, 2025

With its blend of culinary history, intense challenges and playful banter, “Clash of the Cookbooks” feels like comfort viewing with a brainy twist, perfect to binge over the holiday break.

From Salon • Dec. 25, 2024

And all those brainy public-school people Professor Garcia just mentioned?

From "The Smartest Kid in the Universe" by Chris Grabenstein