/dif/ 1. A change listing, especially giving differences between (and additions to) different versions of a piece of source code or documentation (the term is often used in the plural "diffs")."Send me your diffs for the Jargon File!"Compare vdiff.2. Specifically, such a listing produced by the diff Unix command, especially when used as input to the patch utility (which actually performs the modifications).This is a common method of distributing patches and source updates.3. To compare (whether or not by use of automated tools on machine-readable files).See also vdiff, mod.[Jargon File](1995-02-10)