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

False morels look more brainy than real morels, often with more wrinkles, folds, and channels than true pores. — Katie Hill, Outdoor Life, 6 Aug. 2026

There’s also hints of vulnerability and genuine tenderness in her stern headmistress of the bedroom, which Wilde slips in just slyly enough to let the presence of a heart peek through all the brainy brashness and hormone overload. — David Fear, Rolling Stone, 30 July 2026

Here was a brainy, confident bombshell who couldn’t be treated like a disposable plaything — a type of actor Hollywood has lusted for since those earlier black-and-white classics but usually mishandles. — Amy Nicholson, Los Angeles Times, 30 July 2026

Octopuses are as clever, in their own way, as such famously brainy animals as crows, dolphins or chimpanzees. — Cody Cottier, Scientific American, 29 July 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