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

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 The city in January 2015 approved of the riprap but then reversed its position a few months later, state records show., "Decks now collapsing on Oregon beach house at center of riprap battle," 27 Apr. 2018 The concrete guide wall is on top of 80-year-old wood pilings and riprap. Meg Jones, Milwaukee Journal Sentinel, "The Mississippi River lock and dam system is critical to the economy. But it's falling apart fast.," 1 June 2018 Topwaters work over the beds, above hydrilla and coontail that has not topped out and along hard edges like seawalls and riprap banks. Joe Songer,, "See video of a turkey hunter calling up a bobcat," 30 Apr. 2018 On Lower Shaker Lake, dam seepage needs to be shored up, and additional erosion control will be going in, consisting of river rock above the normal water line and limestone riprap below. Thomas Jewell,, "Shaker Lakes dam projects will close down walkways for over a year," 7 Feb. 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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Statistics for riprap

Last Updated

10 Jul 2019

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Time Traveler for riprap

The first known use of riprap was in 1822

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Rhyming Dictionary: Words that rhyme with riprap

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of or relating to the heavens

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