The Free On-line Dictionary of Computing (30 December 2018):

Page Description Language

   (PDL) A language such as Adobe Systems, Inc.'s PostScript
   or Xerox's Interpress which allows the appearance of a
   printed page to be described in a high-level,
   device-independent way.  Printing then becomes a two-stage
   process: an application program produces a description in
   the language, which is then interpreted by a specific output
   device.  Such a language can therefore serve as an interchange
   standard for transmission and storage of printable documents.

   (1995-02-20)