(idiomatic) Strict secretiveness maintained by the members of a group with respect to information which might be contrary to their interests, especially information concerning questionable actions by members of the group.

To be bored and idle. / Used other than figuratively or idiomatically: see stare, wall.

plural of hanging wall

(geology) The section of rock that extends above a diagonal fault line (the corresponding lower section being the footwall).

Alternative form of drywall

plural of dry wall

A wall made from stone.

Alternative form of stonewall.

plural of cavity wall

A specialised hand-held power tool used for cutting narrow grooves in walls, for instance when laying electrical cable.