Source : Webster's Revised Unabridged Dictionary (1913)

Creaser \Creas"er\ (kr?s"?r), n.
   1. A tool, or a sewing-machine attachment, for making lines
      or creases on leather or cloth, as guides to sew by.

   2. A tool for making creases or beads, as in sheet iron, or
      for rounding small tubes.

   3. (Bookbinding) A tool for making the band impression
      distinct on the back. --Knight.