brainy

adjective

ˈbrā-nē 

brainier; brainiest

: having or showing a well-developed intellect : intelligent

braininess noun

Synonyms of brainy

• intelligent
• clever
• smart
• quick
• brilliant
• fast

Examples of brainy in a Sentence

a brainy student who didn't fit in socially

Recent Examples on the Web

From the Kahn Brothers comes a brainy comedy about fathers and sons, science and madness, and second chances. — Patrick Hipes, Deadline, 10 Nov. 2026

The photos and trailer released Thursday show Boyle as a brazen, ambitious college student who teams up with Garner’s brainy Ellison to launch their own cryptocurrency business. — Lily Ford, HollywoodReporter, 8 Oct. 2026

Novitskaya succeeds Jean-Marc Loubier, the brainy, energetic executive who masterminded the rejuvenation and global expansion of Delvaux in the 2010s. — Miles Socha, Footwear News, 28 Sep. 2026

Don Adams led the slapstick spy spoof as the brainy but hopelessly incompetent Agent Smart, starring alongside Barbara Feldon as the ever-capable Agent 99. — Jack Dunn, Variety, 9 Sep. 2026

Word History

First Known Use

1845, in the meaning defined above

Rhymes for brainy

• cheyney
• grainy
• rainey
• zany
• allegany
• miscellany
• theophany
• terrane

Kids Definition

brainy

adjective

ˈbrā-nē 

brainier; brainiest

: intelligent sense 1b

braininess noun