Diplomatic Service

noun

(in Britain) the division of the Civil Service which provides diplomats to represent the U.K. abroad
(not capitals) the equivalent institution of any other country

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012