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

Word History and Origins

Origin of cavity wall¹

First recorded in 1905–10

Example Sentences

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

From Project Gutenberg