uninstall Syllabification: (un·in·stall)Pronunciation: /ˌəninˈstôl/ (British also uninstal)Definition of uninstall verb (uninstalls or Britishuninstals, uninstalling, uninstalled) [with object] remove (an application or file) from a computer. Derivatives uninstallationPronunciation: /ˌən-instəˈlāSHən/ noun uninstaller noun uninstall in other Oxford dictionaries Definition of uninstall in the British & World English dictionary