DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   xterm
      <operating system> A terminal emulator program for the X
    Window System.  A user can have many different invocations of
      xterm running at once on the same display, each of which
      provides independent input and output for the process running
      in it (normally a shell).
      (1996-08-23)