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cavity wall

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noun Masonry.

a wall built with an enclosed inner space to prevent penetration by water.

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Origin of cavity wall

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of cavity wall

British Dictionary definitions for cavity wall

cavity wall

noun

a wall that consists of two separate walls, joined by wall-ties, with an airspace between them
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