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 The work includes ditch straightening, pipe cutting, removing pipes and grates, removing trees on slopes and installing riprap, which are boulders, stones or rocky material that are placed to prevent erosion. Christina Hall, Detroit Free Press, 17 Aug. 2022 After Dorian, when the forces of waves dug caverns that undermined the building’s foundations, the cliffs were reinforced with a sloping wall of riprap, a mix of small- and medium-sized rocks. Taras Grescoe, Smithsonian Magazine, 28 July 2022 That’s what inspired a group of UM scientists to design a riprap replacement, designed with mangroves and other plant life in mind. Alex Harris, Orlando Sentinel, 16 Apr. 2022 In Miami-Dade, that’s why new seawalls are required to have a pile of rocks — known as riprap — at their base. Alex Harris, Orlando Sentinel, 16 Apr. 2022 Reds are more often found on shell bottom and around riprap where there’s current flowing to bring bait past them—live shrimp or jigs get them. Frank Sargeant, al, 18 June 2021 Bass fishing is rated fair on Rat-L-Traps around fish schooling on the surface, while flat-sided crankbaits and spinnerbaits are best on shallow rocks, riprap and woody cover a well as in the weedlines; Frank Sargeant, al, 22 Oct. 2021 Lakefront homeowners are scrambling to add seawalls or riprap, slopes of rock or concrete that block waves. Mario Koran, Milwaukee Journal Sentinel, 22 Dec. 2021 Reds and some flounder are around the creek outflows, rockpiles, riprap and other hard structure with deeper water close by—fresh cut shrimp on a jig head is hard to beat, but the Berkley GULP Shrimp is a close second. Frank Sargeant, al, 8 Oct. 2021 See More

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.

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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Last Updated

19 Aug 2022

Cite this Entry

“Riprap.” Dictionary, Merriam-Webster, Accessed 3 Oct. 2022.

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