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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

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.

Less known-but similarly compelling—is the brainy leap that’s happening with my best sport, eating.

From The Wall Street Journal • Apr. 28, 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

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

All the brainy people in the audience, like Grace’s father and the district superintendent, chuckled.

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

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