cavity wall

noun Masonry.

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

Origin of cavity wall

First recorded in 1905–10

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for cavity wall

Historical Examples of cavity wall

Many English provincial authorities in determining the thickness of a cavity-wall, take the outer portion into consideration.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3
Various

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