noun
diplomat; diplomatic envoy
Formal term for a person sent on a diplomatic mission; often used in official contexts.
彼は外交使節としてフランスに派遣された。
He was dispatched to France as a diplomatic envoy.
外交官 is the general term for a diplomat or foreign service officer, while 外交使節 specifically refers to an envoy sent on a particular mission.
Compound of 外交 (diplomacy) and 使節 (envoy, mission).