WordReference Random House Unabridged Dictionary of American English © 2019
back•wash  (bakwosh′, -wôsh′),USA pronunciation n. 
  1. Nautical, Naval Termswater thrown backward by the motion of oars, propellers, paddle wheels, etc.
  2. Aeronauticsthe portion of the wash of an aircraft that flows to the rear, usually created by the power plant. Cf. wash (def. 35).
  3. a condition, usually undesirable, that continues long after the event which caused it.

  1. to affect, as by hitting, rocking, or splashing, with a backwash:a powerful cutter backwashing the skiers.
  2. Buildingto clean out (a clogged filter) by reversing the flow of fluid:Backwash the swimming pool's filters regularly.
backwash′er, n. 
  • back2 + wash 1765–75
    • 3.See corresponding entry in Unabridged aftermath, consequence, result, upshot.

Collins Concise English Dictionary © HarperCollins Publishers::

backwash /ˈbækˌwɒʃ/ n
  1. water washed backwards by the motion of oars or other propelling devices
  2. the backward flow of air set up by an aircraft's engines
  3. a condition resulting from a previous event; repercussion

'backwash' also found in these entries:

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