Definition of riprap in English:

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Pronunciation: /ˈriprap/
North American


Loose stone used to form a foundation for a breakwater or other structure.
Example sentences
  • Both the pool and its protective lining of stone riprap must be properly sized.
  • Therefore, the texture of the bottoms of channels should be made rough with vegetation or riprap, and outlet structures should be properly designed with energy dissipaters.
  • A rock and log structure was placed within the riprap and willow structures to improve instream habitat for fish.

verb (ripraps, riprapping, riprapped)

[with object]
Strengthen with riprap.
Example sentences
  • A creek near the back of the house was riprapped with large chunks of sidewalk that were jackhammered out
  • A large section of streambank was riprapped to prevent the landowner's septic system and 20 feet of severely slumping shoreline from washing into the brook.


Mid 19th century (originally US): reduplication of rap1.

For editors and proofreaders

Syllabification: rip·rap

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