patch
World of Warcraft
A downloadable update that fixes bugs, improves stability and introduces new features to a program.
Perl
To fix by applying one, as it were. In the realm of hackerdom, a listing of the differences between two versions of a program as might be applied by the patch(1) program when you want to fix a bug or upgrade your old version.
Telecommunications
To connect circuits together temporarily. Note: In communications, patches may be made by means of a cord, i.e., a cable, known as a "patch cord." In automated systems, patches may be made electronically. 2. In a computer program, one or more statements inserted to circumvent a problem or to alter temporarily or permanently a usually limited aspect or characteristic of the functioning of the program, e.g., to customize the program for a particular application or environment.