Hotfix
A hotfix is a term often used by a manufacturer or developer to describe a vital fix or correction in software. What makes a hotfix different than a patch is that they are created specifically for a customer's need and not distributed to the public.
Hotfixes are for mission critical systems that are not functioning properly or released as a way for a developer to test a fix before adding it to an update for the general public.
Also see: Patch, Security definitions, Update
