A group of people who identify with one another, especially on the basis of racial, cultural, or religious grounds.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "ethnic group" in a sentence
""They are in the ethnic group required by Nekkar," Helva remarked dubiously,"
"Schroen had a good rapport with Massoud and his key aides and he also spoke Dari, the language of the Tajik ethnic group that dominated the Northern Alliance."
""The Senate favors no social or ethnic group above another, " Luminara countered."