Ambassador

n. diplomatic official sent to a state as a representative of another state

An ambassador is a diplomatic official accredited to a foreign sovereign or government, or to an international organization, to serve as the official representative of his or her own country. In everyday usage it applies to the ranking government representative stationed in a foreign capital. The host country typically allows the ambassador control of specific territory called an embassy, whose territory, staff, and even vehicles are generally afforded diplomatic immunity in the host country.
See more at Wikipedia.org...

Noun
1. a diplomat of the highest rank; accredited as representative from one country to another
(synonym) embassador
(hypernym) diplomat, diplomatist
(hyponym) ambassadress
2. an informal representative; "an ambassador of good will"
(hypernym) spokesperson, interpreter, representative, voice

(n.)
Alt. of Embassador
  

A citizen that has been officially asked by their country to live in another country in order to legally represent it. - (read more on Ambassador)