'Brainy' definitions:

Definition of 'brainy'

adjective

Having or marked by unusual and impressive intelligence; "some men dislike brainy women"; "a brilliant mind"; "a brilliant solution to the problem" [syn: brainy, brilliant, smart as a whip]

Definition of 'Brainy'

From: GCIDE

Brainy \Brain"y\ (br[=a]n"[y^]), a.
1. Having an active or vigorous mind. [Colloq.] [1913 Webster]
2. highly intelligent. [PJC] Braise

Synonyms of 'brainy'

From: Moby Thesaurus

adroit,
alert,
apt,
bright,
brilliant,
clever,
dexterous,
gifted,
keen,
keen-witted,
knowing,
nimble,
nimble-witted,
no dumbbell,
not born yesterday,
quick,
quick-thinking,
quick-witted,
scintillating,
sharp,
sharp-witted,
smart,
steel-trap,
talented