adjective, brain·i·er, brain·i·est. Informal.
intelligent; clever; intellectual.
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Origin of brainy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for brainier
Mr. Miller: "I believed them sincere particularly the brainier men."The Pullman Boycott|W. F. Burns
Mr. Mix knew that he was brainier than John Starkweather; he admitted it.Rope|Holworthy Hall
Rosalind not like Beatrice, Eleanor like Beatrice, only wilder and brainier.This Side of Paradise|F. Scott Fitzgerald
adjective brainier or brainiest
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
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