ambassador: Meaning and Definition of

am•bas•sa•dor

1. a diplomatic official of the highest rank, sent by one sovereign or state to another as its resident representative
2. a diplomatic official of the highest rank sent by a government to represent it on a temporary mission, as for negotiating a treaty.
3. a diplomatic official serving as permanent head of a country's mission to the United Nations or some other international organization.
4. an authorized messenger or representative. Abbr.: Amb., amb.