a diplomatic agent.

any accredited messenger or representative.

Also called envoy extraordinary, minister plenipotentiary. a diplomatic agent of the second rank, next in status after an ambassador.

noun

agent , ambassador , attach , bearer , carrier , charg d’affaires , consul , courier , delegate , diplomat , emissary , intermediary , internuncio , legate , medium , messenger , minister , nuncio , plenipotentiary , representative , vicar , conveyer , runner , transporter , attache , deputy