Having a dynamic or vigorous brain
- having or marked by strange and impressive intelligence
- Having an active or vigorous brain.
1845, from mind (n.) + -y (2). Latin comparable cerebrosus intended "passionate, hot-headed," leading Tucker to comment that " 'Brainy' is certainly not a normal appearance for 'frantic.' "
(a.) Having an energetic or strenuous mind.
She's the brainy one.