Plat"band` (?), n. [F. plate-bande; plat, plate, flat, level + bande a band.]
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.
A list or fillet between the flutings of a column.
© Webster 1913.