Patch

1. Patching a software means that the issues and problems previously detected from the software have been resolved. Click to know more about expert level training (Source: Business Continuity Management Institute - BCM Institute)

 

A Manager’s Guide to Business Continuity Management for Cybersecurity Incident Response

2. A patch, sometimes just called a fix, is a small piece of software that's used to correct a problem, usually called a bug, within an operating system or software program.
Source: (Fisher, 2017)

3. A patch is a piece of software code that can be applied after the software program has been installed to correct an issue with that program.
Source: (Computer Hope, 2017)