From Longman Dictionary of Contemporary Englishprivate secretaryˌprivate ˈsecretary noun [countable] 1 BOa secretary who is employed to help one person, especially with personal business2 British English a civil servant whose job is to help a government minister a parliamentary private secretary
Examples from the Corpus
private secretary• In the ensuing Parliament he served as a private secretary at the Colonial Office.• Academician Scriabin has even claimed that Sakharov has a private secretary!• With her were only her private secretary and the ever-present detective.• In 1976 Cardinal Hume appointed the then Father Crowley as his private secretary.• He sent his private secretary down the corridor to see Sir Norman Brook to ask if they could be provided.• Berowne's private secretary spoke after the manner of his kind. 