01 n. A row of balusters topped by a rail, serving as an open parapet, as along the edge of a balcony, terrace, bridge, or the eaves of a buildin…
-
1.
A row of balusters topped by a rail, serving as an open parapet, as along the edge of a balcony, terrace, bridge, or the eaves of a building, or as a guard railing on a staircase; -- it serves as a guard to prevent people from falling.(Arch.)