2
general::
noun ADJ. former | British, French, etc. VERB + AMBASSADOR serve as | appoint, appoint sb (as), make sb She's been appointed British ambassador to the UN. | send The King sent an ambassador to Paris. | recall, withdraw The US ambassador was recalled to Washington in protest. | expel PREP. ~ in the Israeli ambassador in London | ~ to He served as ambassador to Syria.
Oxford Collocations Dictionary