(of a person) clean, tidy, and well dressed

you look very smart

having or showing a quick-witted intelligence

if he was that smart he would never have been tricked

(of a device) programmed so as to be capable of some independent action

hi-tech smart weapons

quick; brisk

he set off at a smart pace

(of a wound or part of the body) feel or cause a sharp stinging pain

her legs were scratched and smarting

the cut was smarting

sharp stinging pain

the smart of the recent cuts

intelligence; acumen

I don't think I have the smarts for it