What is the meaning of smart?

noun

• A kind of pain such as that caused by a wound or a burn or a sore.
  • synonyms: smarting, smartness

verb

• Be the source of pain.
  • synonyms: ache, hurt

adjective

• Showing mental alertness and calculation and resourcefulness.
• Elegant and stylish.
  • usage: "chic elegance"; "a smart new dress"; "a suit of voguish cut"
  • synonyms: chic, voguish
• Characterized by quickness and ease in learning.
  • usage: "some children are brighter in one subject than another"; "smart children talk earlier than the average"
  • synonyms: bright
• Improperly forward or bold.
  • usage: "don't be fresh with me"; "impertinent of a child to lecture a grownup"; "an impudent boy given to insulting strangers"; "Don't get wise with me"
  • synonyms: fresh, impertinent, impudent, overbold, saucy, sassy, wise
• Painfully severe.
  • usage: "he gave the dog a smart blow"
• Quick and brisk.
  • usage: "I gave him a smart salute"; "we walked at a smart pace"
• Capable of independent and apparently intelligent action.
  • usage: "smart weapons"