emissary-n; 2 Senses

Sense Number 1: a messenger deployed on a mission on behalf of someone else

Commentary: EMISSARY[+person][+messenger][+deployed][+mission] [+relation][+role][+representative][+sanctioned]

Several European nations are sending high-ranking emissaries to the state funeral.
She has been an effective emissary for their charitable causes in poor parts of the world.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: a secret agent, spy

Commentary: EMISSARY[+person][+spy] [+relation][+role][+agent][+espionage]
NOTE: can convey a pejorative connotation, unlike Sense 1

The dictator accused their embassy of harboring emissaries of the enemy.
He had worked as an emissary during the Cold War, posing as a school teacher.

WordNet 0.0 Sense Numbers: 2