n. (Arch.) The interval or space between two pilasters. Elmes. [ 1913 Webster ]
n. [ F. pilastre, It. pilastro, LL. pilastrum, fr. L. pila a pillar. See Pillar. ] (Arch.) An upright architectural member right-angled in plan, constructionally a pier (See Pier, 1
a. Furnished with pilasters. [ 1913 Webster ]