\Plat"band`\, n. [F. plate-bande; plat, plate, flat,
level + bande a band.]
1. A border of flowers in a garden, along a wall or a
   parterre; hence, a border.

2. (Arch.)
   (a) A flat molding, or group of moldings, the width of
       which much exceeds its projection, as the face of an
       architrave.
   (b) A list or fillet between the flutings of a column.