to be a source of sharp, local, and usually superficial pain, as a wound.

to be the cause of a sharp, stinging pain, as an irritating application, a blow, etc.

to feel a sharp, stinging pain, as in a wound.

to suffer keenly from wounded feelings

She smarted under their criticism.

to feel shame or remorse or to suffer in punishment or in return for something.

to cause a sharp pain to or in.

quick or prompt in action, as persons.

having or showing quick intelligence or ready mental capability

a smart student.

shrewd or sharp, as a person in dealing with others or as in business dealings

a smart businessman.

clever, witty, or readily effective, as a speaker, speech, rejoinder, etc.

dashingly or impressively neat or trim in appearance, as persons, dress, etc.

socially elegant; sophisticated or fashionable

the smart crowd.

saucy; pert

smart remarks.

sharply brisk, vigorous, or active

to walk with smart steps.

sharply severe, as a blow, stroke, etc.

sharp or keen

a smart pain.

Informal . equipped with, using, or containing electronic control devices, as computer systems, microprocessors, or missiles

a smart phone; a smart copier.

Computers . intelligent ( def. 4 ) .

Older Use . considerable; fairly large.

in a smart manner; smartly.

a sharp local pain, usually superficial, as from a wound, blow, or sting.

keen mental suffering, as from wounded feelings, affliction, grievous loss, etc.

smarts, Slang . intelligence; common sense

He never had the smarts to use his opportunities.