What is the meaning of patter?

noun

• Plausible glib talk (especially useful to a salesperson.
  • synonyms: spiel, line of gab
• A quick succession of light rapid sounds.
  • usage: "the patter of mice"; "the patter of tiny feet"

verb

• Rain gently.
  • usage: "It has only sprinkled, but the roads are slick"
  • synonyms: sprinkle, spit, spatter, pitter-patter
• Make light, rapid and repeated sounds.
  • usage: "gently pattering rain"
  • synonyms: pitter-patter