riprap

[ rip-rap ]
/ ˈrɪpˌræp /

noun

a quantity of broken stone for foundations, revetments of embankments, etc.
a foundation or wall of stones thrown together irregularly.

verb (used with object), rip·rapped, rip·rap·ping.

to construct with or strengthen by stones, either loose or fastened with mortar.

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Origin of riprap

First recorded in 1570–80; gradational reduplication of rap1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for riprap

British Dictionary definitions for riprap

rip-rap

noun

civil engineering broken stones loosely deposited in water or on a soft bottom to provide a foundation and protect a riverbed or river banks from scour: used for revetments, embankments, breakwaters, etc

Word Origin for rip-rap

C19: reduplication of rap 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012