swap file

from WordNet (r) 3.0 (2006)

swap file
    n 1: the disk space that is set aside for virtual memory [syn:
         {swap space}, {swap file}]

from The Free On-line Dictionary of Computing (8 July 2008)

swap file

   <operating system> A file used by a {program} or, more often,
   an {operating system} as {swap space}.  A swap file is usually
   allocated as a long contiguous section of a {hard disk} to
   reduce access time.  The disk space used for a swap file can
   not be used for other things.  Under {Microsoft Windows}, swap
   files are recommended not to exceed three times the available
   {RAM} and are usually 150 percent of the RAM size.

   (1996-11-15)