noun.
A person who is accredited, such as an ambassador, to officially represent a government in its relations with other governments or international organisations
noun.
Someone who uses skill and tact in dealing with other people
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a person who deals tactfully with others
noun.
an official engaged in international negotiations
Word Usage
""In the 21st century, a diplomat is as likely to meet with a tribal elder in a rural village as a counterpart in a foreign ministry, and is as likely to wear cargo pants as a pinstriped suit," Clinton writes."