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cavity wall

noun

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


cavity wall

noun

  1. 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


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Word History and Origins

Origin of cavity wall1

First recorded in 1905–10
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Example Sentences

Many English provincial authorities in determining the thickness of a cavity-wall, take the outer portion into consideration.

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