Plenipotentiary

n.	1.	A person invested with full power to transact any business; especially, an ambassador or envoy to a foreign court, with full power to negotiate a treaty, or to transact other business.
a.	1.	Containing or conferring full power; invested with full power; as, plenipotentiary license; plenipotentiary ministers.

Noun

1.

plenipotentiary - a diplomat who is fully authorized to represent his or her government

PLENIPOTENTIARY. Possessing full powers; as, a minister plenipotentiary, is one authorized fully to settle the matters connected with his mission, subject however to the ratification of the government by which he is authorized. Vide Minister.

absolute, all-powerful, almighty, ambassador, ambassadorial, ambassadress, apostolic delegate, attache, career diplomat, chancellor, charge, commercial attache, consul, consul general, consular, consular agent, diplomat, diplomatic, diplomatic agent, diplomatist, emissary, envoy, envoy extraordinary, foreign service officer, internuncio, legate, military attache, minister, minister plenipotentiary, minister resident, ministerial, nuncio, omnipotent, resident, secretary of legation, sovereign, supreme, unlimited, vice-consul, vice-legate