Definitions of clack
  1. noun
    a sharp abrupt noise as if two objects hit together; may be repeated
    synonyms: clap
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    type of:
    sound of any kind (especially unintelligible or dissonant sound)
  2. verb
    make a rattling sound
    synonyms: brattle, clatter
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    type of:
    make noise, noise, resound
    emit a noise
  3. verb
    make a clucking sounds, characteristic of hens
    synonyms: click, cluck
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    type of:
    emit, let loose, let out, utter
    express audibly; utter sounds (not necessarily words)
  4. verb
    speak (about unimportant matters) rapidly and incessantly
  5. noun
    a simple valve with a hinge on one side; allows fluid to flow in only one direction
    synonyms: clack valve, clapper valve
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    type of:
    control consisting of a mechanical device for controlling the flow of a fluid
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