deselect /ˌdiːsəˈlɛkt/ verb3 •To not select; to rule out of selection. •(UK) To reject (an incumbent) as a party's candidate for a forthcoming election.One recently deselected Sinn Féin assembly member, Davy Hyland in Newry and Armagh, has already quit the party in protest. — 2007 •To remove from an existing selection.Make sure you deselect any files you wish to keep before proceeding with the deletion. formsdeselected · deselecting · deselects