high commissioner
noun
- chief representative of the government of one country assigned an ambassadorial post in another country
Wiktionary
noun
- Any of various high-ranking officials, often diplomats.
“The United Nations has a number of high commissioners.”
- An ambassador of one Commonwealth country to another.
“The British high commissioner to Canada”
- An indirect ruler of a British protectorate or territory, equivalent to a governor in a crown colony.