1. an official representative of a country’s government in a foreign nation
2. a person who represents or promotes a particular activity, cause, or organization

Examples

• The ambassador met with the foreign minister to discuss trade agreements.
• She served as the U.S. ambassador to France for three years.
• The company appointed him as a brand ambassador for their new product line.
• As a goodwill ambassador, she traveled the world promoting literacy programs.
• The ambassador presented his credentials to the head of state.
• He became an ambassador for environmental conservation after retiring from politics.
• The cultural ambassador helped strengthen ties between the two nations.