ambassador
am·bas·sa·dor
/æmˈbæsədɚ/ noun , pl -dors [ count ]
: the highest-ranking person who represents his or her own government while living in another country
Embassy officials met with the ambassador.
— often + to
She became the American ambassador to Italy [=she began representing America in Italy] several years ago.
— often used figuratively
a baseball player who has been a very effective ambassador [=representative] for his sport
an ambassador of hope [=a person who tries to bring hope to another country or group of people]
a goodwill ambassador [=a person who travels to different places to promote friendship and goodwill]
am·bas·sa·do·ri·al /æmˌbæsəˈdorijəɬ/ adj
his first ambassadorial assignment