unusually advanced or mature in development, esp. mental development

a precocious child.

prematurely developed, as the mind, faculties, etc.

of or pertaining to premature development.

Botany .

flowering, fruiting, or ripening early, as plants or fruit.

bearing blossoms before leaves, as plants.

appearing before leaves, as flowers.

adjective

stupid

adjective

advanced , aggressive , ahead of time , beforehand , bold , brassy * , bright , cheeky * , cocky * , developed , early , flip * , flippant , forward , fresh , intelligent , mature , nervy , premature , presumptuous , pushy , quick , sassy * , smart-alecky , untimely , progressive , gifted , sassy , smart