Masonry type of construction made with brick, structural clay tile or concrete masonry units or any combination of such units in which facing and backing are completely separated except for the metal ties which serve as bonding. (UBC)
Masonry wall built with a continuous air space between the outer masonry and the inner wall (typically concrete block or frame construction). Water that penetrates the outer masonry runs down through the cavity and is directed out at the bottom through weep holes. (Ask us about solutions for maintaining the integrity of the cavity.)
A wall comprising two leafs of brick or blockwork tied together, with an air gap/insulation between.