noun
Refers to a group of people sent on an official mission, typically diplomatic, governmental, or organizational.
日本の使節団が国連総会に出席した。
The Japanese delegation attended the UN General Assembly.
経済使節団が来週、東南アジアを訪問
An economic mission is scheduled to visit Southeast Asia next week.
使節 refers to an individual envoy or delegate, whereas 使節団 is the group or delegation as a whole.
Compound of 使節 (envoy, delegate) and 団 (group, body). The word 使節 itself is composed of 使 (use, send on a mission) and 節 (node, section, here implying a person of standing).