Patch
Patch
A supplementary program that fixes bugs and vulnerabilities in software.
In Simple Terms
A patch is a small program released to fix bugs or security vulnerabilities discovered in software. Applying a patch lets you correct just the problematic part of an app or OS you're already using — without having to reinstall everything from scratch. Software updates on your smartphone or computer may include patches like these, aimed at fixing bugs or closing security vulnerabilities.
Behind the Name
The word "patch" originally referred to a piece of fabric sewn over a hole in clothing. In computing, the name carries the same idea: when a flaw is found in finished software, developers "patch over" just that part rather than rebuilding the whole thing from scratch.
Take a Closer Look!
A patch is a program added after the fact to fix a bug discovered in software that is already complete and in use.
Even software that seems flawless during development can reveal unexpected errors or security weaknesses once real users start relying on it.
Rebuilding and redistributing the entire software from scratch every time that happens would be a heavy burden — for developers and users alike. That's where patches come in: instead of replacing everything, they "fill in" just the problematic part, much like sewing a patch over a hole in fabric.
Staying current with patches is critically important for security. Security patches in particular are designed to close vulnerabilities in software that malicious attackers could exploit.
Left unaddressed, these weaknesses put you at real risk — someone could steal your personal information or take control of your device without your knowledge. That's why it's important to apply patches from the developer as soon as they become available, so your system stays protected.