rip·​rap | \ ˈrip-ˌrap How to pronounce riprap (audio) \

Definition of riprap

 (Entry 1 of 2)

1 : a foundation or sustaining wall of stones or chunks of concrete thrown together without order (as in deep water) also : a layer of this or similar material on an embankment slope to prevent erosion
2 : material used for riprap


riprapped; riprapping; ripraps

Definition of riprap (Entry 2 of 2)

transitive verb

1 : to form a riprap in or upon
2 : to strengthen or support with a riprap

Examples of riprap in a Sentence

Recent Examples on the Web: Noun Sheepshead remain a good bet around the gas rigs, riprap and hard bottom in the lower bay on live shrimp. Frank Sargeant, al, "Friday Fishing Report: Heavy rains make fishing difficult for anglers," 21 Feb. 2020 Sheepshead are biting well around riprap, artificial reefs and gas wells all around Mobile Bay; Frank Sargeant, al, "Friday Fishing Report: What’s working for anglers on Alabama lakes," 24 Jan. 2020 About four to five weeks of work is slated at each site, with about 10,000 cubic yards of riprap to be spread among the locations, according to the Transportation Department. Mary Wisniewski,, "Following severe fall storms, Chicago launches shoreline protection project at Juneway Beach," 18 Nov. 2019 Extensive riprap at the base of the bluffs have likely slowed the erosion. San Diego Union-Tribune, "Column: Coming to grips with San Diego’s crumbling coastline," 14 Aug. 2019 Beneath the sandy hummocks are riprap and cobblestones, substances that were already in the area before the project began. Barbara Henry, San Diego Union-Tribune, "Officials celebrate ‘living shoreline’ project’s conclusion," 23 May 2019 Cabrillo reconfigured the remaining rock riprap to protect the site and finished the pipeline removal. Phil Diehl, San Diego Union-Tribune, "Coastal power plant’s rocks to stay to prevent damage to roadway," 8 June 2019 Spots and largemouths are still active along the grass edges, riprap and woody cover on the deeper flats—crankbaits, worms and jigs get them; Frank Sargeant,, "Friday Fishing Report: Cooler temperatures help anglers," 7 June 2019 Just beyond the northern reach of the park, there’s a grassy mound—bearded in stony riprap to prevent erosion--that overlooks the East River: an older public park. Julie V. Iovine, WSJ, "Sweet Design on the Brooklyn Waterfront," 30 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'riprap.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of riprap


1822, in the meaning defined at sense 1


1837, in the meaning defined at sense 1

History and Etymology for riprap


obsolete riprap sound of rapping

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Time Traveler for riprap

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The first known use of riprap was in 1822

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Cite this Entry

“Riprap.” Dictionary, Merriam-Webster, Accessed 6 Aug. 2020.

More from Merriam-Webster on riprap

Rhyming Dictionary: Words that rhyme with riprap

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