a rectangular support or pier projecting partially from a wall and treated architecturally as a column, with a base, shaft, and capital
Origin of pilasterFrench pilastre ; from Italian pilastro ; from Classical Latin pila, a pile, column
A rectangular column with a capital and base, projecting only slightly from a wall as an ornamental motif.
Origin of pilasterFrench pilastre, from Old French, from Old Italian pilastro, from Medieval Latin pīlaster : Latin pīla, pillar + Latin -aster, n. suff., or blend of Latin pīla, pillar, and Late Latin parastatēs, pilaster (from Greek, stay, supporter : para-, beside; see para–1 + -statēs, -stat).