Definition - What does Uninstall mean?
Techopedia explains Uninstall
For electronic devices such as smartphones and tablets, app removers are available that perform a similar functionality to that of an uninstaller. For most operating systems, commands are available at the kernel level for uninstalling applications or programs. The commands and the method of removal vary according to the operating system and, sometimes, to the type of applications. If the program is installed on a Windows operating system, the user can uninstall it from the Control Panel using the "Uninstall a program" option. If this procedure does not work, the user can use the Windows system-restore-point feature to uninstall an application, which brings the system to its state prior to the installation of the program.