diploˈmatize or diploˈmatise intransitive verb and transitive verb

To practise, or bring about by, diplomacy

diplomatolˈogy noun

The study or science of diplomatics, charters, decrees, etc

diplomatic bag or (US) pouch noun

1. A bag used for sending documents, etc to and from embassies, free of customs control
2. The contents of such a bag

diplomatic corps noun

The whole body of foreign diplomats resident in any capital

diplomatic immunity noun

Immunity from local laws and taxation enjoyed by diplomats abroad

diplomatic relations plural noun

Formal relations between states marked by the presence of diplomats in each other's country

diplomatic service noun

The government department that deals with diplomatic relations with other states