a personal secretary employed to make social appointments and handle personal correspondence.
a member of an organization who arranges its social events
a personal secretary who deals with private correspondence, etc
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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She had written the society column in the local newspaper, before becoming a social secretary planning parties.