Definitions of smart:

• noun:   a kind of pain such as that caused by a wound or a burn or a sore
• verb:   be the source of pain
• adjective:   showing mental alertness and calculation and resourcefulness
• adjective:   characterized by quickness and ease in learning

  Example: "Smart children talk earlier than the average"

• adjective:   elegant and stylish

  Example: "A smart new dress"

• adjective:   improperly forward or bold
• adjective:   marked by smartness in dress and manners
• name:  A surname (common: 1 in 9090 families; popularity rank in the U.S.: #1049)