1. (n.) An agent employed to advance, in a covert manner, the interests of his employers; one sent out by any power that is at war with another, to create dissatisfaction among the people of the latter.

2. (a.) Exploring; spying.

3. (a.) Applied to the veins which pass out of the cranium through apertures in its walls.

Hermes Iris Mercury Paul Revere Pheidippides ambassador ambassadress apostolic delegate attache bearer career diplomat carrier chancellor charge commercial attache commissar commissary commissionaire commissioner consul consul general consular agent courier delegate diplomat diplomatic diplomatic agent diplomatic courier diplomatist envoy envoy extraordinary estafette express foreign service officer go-between herald internuncio legate message-bearer messenger military attache minister minister plenipotentiary minister resident nuncio plenipotentiary post postboy postrider resident runner secretary secretary of legation vice-consul vice-legate