Definition of ambassador
1
: an official envoy
especially
: a diplomatic agent of the highest rank accredited to a foreign government or sovereign as the resident representative of his or her own government or sovereign or appointed for a special and often temporary diplomatic assignment
She's the American ambassador to Italy.
2a
: an authorized representative or messenger
b
: an unofficial representative
traveling abroad as ambassadors of goodwill
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Merriam-Webster unabridged
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Time Traveler for ambassador
The first known use of ambassador was in the 14th century
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