verb (used without object)

1.  To be a source of sharp, local, and usually superficial pain, as a wound.
2.  To be the cause of a sharp, stinging pain, as an irritating application, a blow, etc.
3.  To feel a sharp, stinging pain, as in a wound.
4.  To suffer keenly from wounded feelings: She smarted under their criticism.
5.  To feel shame or remorse or to suffer in punishment or in return for something.