[ rip-rap ]

  1. a quantity of broken stone for foundations, revetments of embankments, etc.

  2. a foundation or wall of stones thrown together irregularly.

verb (used with object),rip·rapped, rip·rap·ping.
  1. to construct with or strengthen by stones, either loose or fastened with mortar.

Origin of riprap

First recorded in 1570–80; gradational reduplication of rap1

Words Nearby riprap Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use riprap in a sentence

British Dictionary definitions for rip-rap


  1. 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

Origin of 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