An upright architectural member right-angled in plan, constructionally a pier (See Pier, 1 (b)), but architecturally corresponding to a column, having capital, shaft, and base to agree with those of the columns of the same order. In most cases the projection from the wall is one third of its width, or less.
A squared column or pillar used to help support the structure. The pilaster often has a base and a capital. In Greek architecture the pilaster is the same size at the top and bottom, in Roman the pilaster is diminished at the top. Often these are decorative.
Rectangular column especially one fastened into wall.
a flat, shallow rectangular column projecting from a wall with a base and.