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definitions

clack valve

noun

a valve having a hinged flap permitting flow only in the direction in which the flap opens.

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Nearby words

  1. clabber,
  2. clabber cheese,
  3. clabby-doo,
  4. clachan,
  5. clack,
  6. clacker,
  7. clackers,
  8. clackmannan,
  9. clackmannanshire,
  10. clacton

Origin of clack valve

First recorded in 1855–60
Also called flap valve.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019