PIER

Any detached mass of masonry, whether insulated or supporting one side of an arch or lintel, as of a bridge; the piece of wall between two openings.

Any additional or auxiliary mass of masonry used to stiffen a wall. See Buttress.

A projecting wharf or landing place. Abutment pier, the pier of a bridge next the shore; a pier which by its strength and stability resists the thrust of an arch. -- Pier glass, a mirror, of high and narrow shape, to be put up between windows. -- Pier table, a table made to stand between windows.