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retaining wall

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noun
  1. a wall for holding in place a mass of earth or the like, as at the edge of a terrace or excavation.

Origin of retaining wall

First recorded in 1830–40
Also called breast wall.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for retaining wall

retaining wall

noun
  1. a wall constructed to hold back earth, loose rock, etcAlso called: revetment
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