Patch

Definition: A patch is a software update (usually a download) issued by the author that fixes bugs, adds security, or adds new features. A patch is meant to update your current software version, but isn't a large enough change to warrant a rerelease of the entire program. If a patch is released it is important to install it, as it may improve security or fix a compromising bug that previously slipped through. Be sure you download the patch from a reliable source, such as the software's website.