Definitions of ethnicity on the Web:

• an ethnic quality or affiliation resulting from racial or cultural ties; "ethnicity has a strong influence on community status relations"
  wordnetweb.princeton.edu/perl/webwn

• An ethnic group is a group of human beings whose members identify with each other, through a common heritage that is real or presumed.Smith 1987
  en.wikipedia.org/wiki/Ethnicity

• Race and ethnicity in the United States Census, as defined by the United States Census Bureau and the Federal Office of Management and Budget (OMB ...
  en.wikipedia.org/wiki/Ethnicity_(United_States_census)

• The classification of ethnicity in the United Kingdom has attracted controversy in the past: particularly at the time of the 2001 Census where the existence and nature of such a classification, which appeared on the Census form, became more widely known than general.
  en.wikipedia.org/wiki/Ethnicity_(United_Kingdom)

• Ethnicity, is Yanni's 13th studio album, released in 2003, (see 2003 in music) extending his "One World, One People" philosophy. ...
  en.wikipedia.org/wiki/Ethnicity_(Yanni_album)

• The characteristics of an ethnic group; Membership of an ethnic group
  en.wiktionary.org/wiki/ethnicity

• ethnic - cultural: denoting or deriving from or distinctive of the ways of living built up by a group of people; "influenced by ethnic and cultural ties ...
• ethnic - heathen: not acknowledging the God of Christianity and Judaism and Islam
  wordnetweb.princeton.edu/perl/webwn

• ethnically - with respect to ethnicity; "the neighborhood is ethnically diverse"
  wordnetweb.princeton.edu/perl/webwn

• Ethnic - Folk music can have a number of different meanings, but most commonly refers to Traditional music. The original meaning of the term "folk music" was synonymous with the term "Traditional music", also often including World Music and Roots music; the term "Traditional music" was given its more ...
  en.wikipedia.org/wiki/Ethnic_(music)

• ethnically - Of, pertaining to ethnicity or ethnics
  en.wiktionary.org/wiki/ethnically

• An ethnic person, notably said when a foreigner or member of an immigrant community; An ethnic minority; Of or related to a group of people having common racial, national, religious or cultural origins; Belonging to a foreign culture; heathen, not Judeo-Christian
  en.wiktionary.org/wiki/ethnic

• ethnic - Referring to people with origins from different parts of the world.
  www.bloodbook.com/glossary.html

• Ethnicity is a social construction that indicates identification with a particular group which is often descended from common ancestors. Members of the group share common cultural traits (such as language, religion, and dress) and are an identifiable minority within the larger nation-state. ...
  www2.truman.edu/~marc/resources/terms.html

• Entries for ethnicity are included in the online Wikipedia encyclopedia and in xrefer's Dictionary of Geography. D. ...
  www.sciencemag.org/cgi/content/full/298/5597/1337