Definitions for "Pilasters"
A shallow, rectangular column that sticks out a little from the wall.
Rectangular supports treated architecturally as columns.
a column that usually projects a third of its width or less from the wall
Non-structure vertical cladding features. See Ebury House, where pilasters were applied to conceal panel to panel joints.
Masonry projection from a building, but usually decorative in nature and not load bearing (however they may be concealing a load bearing member).