A plenipotentiary (from the Latin plenus "full" and potens "powerful") is a diplomat who has full powers—authorization to sign a treaty or convention on behalf of his or her sovereign.

What does word plenipotentiary mean?

plenipotentiary • \plen-uh-puh-TEN-shuh-ree\ • adjective. 1 : invested with full power 2 : of or relating to a person invested with full power to transact any business.

Who is an ambassador plenipotentiary?

An ambassador with full powers to sign treaties or otherwise act for the state or monarch. 'Following that, he held various posts, mainly in Japan but also elsewhere, before once again becoming ambassador plenipotentiary to Japan in February, 2004.