An official who represents their country in another country, especially for political and diplomatic work. More generally, it can mean someone who represents or promotes a group, brand, or cause.
From Middle English *ambassadour*, via Old French *ambassador*, from Medieval Latin *ambassiator*, based on *ambaxiare* (“to send on a mission”), related to words for “servant” or “messenger.” The root idea is someone sent out to act on behalf of others.
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