Hotfixnoun
(computing) A cumulative package of one or more files used to address a problem in a software product.
Hotfix
A hotfix or quick-fix engineering update (QFE update) is a single, cumulative package that includes information (often in the form of one or more files) that is used to address a problem in a software product (i.e., a software bug). Typically, hotfixes are made to address a specific customer situation.
Bugfixnoun
(computing) A patch or change that fixes unwanted behaviour due to a bug.