ambassadress - a woman ambassador

diplomat, diplomatist - an official engaged in international negotiations

Andrei Andreyevich Gromyko, Andrei Gromyko, Gromyko - Soviet ambassador to the United States and to the United Nations (1909-1989)

spokesperson, representative, interpreter, voice - an advocate who represents someone else's policy or purpose; "the meeting was attended by spokespersons for all the major organs of government"