an official engaged in international negotiations
"The diplomat spent hours negotiating a new trade agreement between the two neighboring countries."
a person who deals tactfully with others
"The new manager acted as a true diplomat by smoothing over tensions between the two departments without making anyone feel personally attacked."
A person, such as an ambassador, who is accredited to represent a government officially in its relations with other governments or international organisations
"The diplomat negotiated a new trade agreement between our country and the European Union."