Wikipedia: Patch

A piece of fabric.
The name of an IBM utility to edit binary files (typically on mainframe installations, eg MVS).
The name of a UNIX utility (written by Larry Wall) that applies a set of diff?s to a set of files, allowing changes from one file to be automatically applied to another file.
A set of diffs suitable for input to the patch program.
A 3d bezier? surface thing used in computer graphics. A primitive in some 3d software packages.