Is the socially defined characteristics of a group of people who share common cultural factors such as race, history, national origin, religious belief, or language.
Ethnicity (also ethnic group) is a category of people who share certain characteristics such as common language, ancestry, history, nationality, culture and society. The term ethnicity is often interchangeable with the term nation.
Examples of ethnicity would be Jewish, Asian or Indian.
Ethnicity should not be confused with race. Race is mainly concerned with characteristics such as skin color, while ethnicity has to do with cultural factors.