What is the meaning of chattering?

noun

• The rapid series of noises made by the parts of a machine.
  • synonyms: chatter
• The high-pitched continuing noise made by animals (birds or monkeys.
  • synonyms: chatter

verb

• Click repeatedly or uncontrollably.
  • usage: "Chattering teeth"
  • synonyms: chatter, click
• Cut unevenly with a chattering tool.
  • synonyms: chatter
• Talk socially without exchanging too much information.
  • usage: "the men were sitting in the cafe and shooting the breeze"
  • synonyms: chew the fat, shoot the breeze, chat, confabulate, confab, chitchat, chit-chat, chatter, chaffer, natter, gossip, jaw, claver, visit
• Speak (about unimportant matters) rapidly and incessantly.
  • synonyms: chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, blabber, gabble
• Make noise as if chattering away.
  • usage: "The magpies were chattering in the trees"
  • synonyms: chatter