What is the meaning of clack?

noun

• A sharp abrupt noise as if two objects hit together; may be repeated.
  • synonyms: clap
• A simple valve with a hinge on one side; allows fluid to flow in only one direction.
  • synonyms: clack valve, clapper valve

verb

• Make a rattling sound.
  • usage: "clattering dishes"
  • synonyms: clatter, brattle
• Make a clucking sounds, characteristic of hens.
  • synonyms: cluck, click
• Speak (about unimportant matters) rapidly and incessantly.
  • synonyms: chatter, piffle, palaver, prate, tittle-tattle, twaddle, maunder, prattle, blab, gibber, tattle, blabber, gabble