Ethnocentrism is the tendency to believe that one's ethnic or cultural group is centrally important, and that all other groups are measured in relation to one's own. The ethnocentric individual will judge other groups relative to his or her own particular ethnic group or culture, especially with concern to language
Language may refer either to the specifically human capacity for acquiring and using complex systems of communication, or to a specific instance of such a system of complex communication...

, behavior, customs, and religion
Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...

. These ethnic distinctions and sub-divisions serve to define each ethnicity's unique cultural identity
Cultural identity
Cultural identity is the identity of a group or culture, or of an individual as far as one is influenced by one's belonging to a group or culture. Cultural identity is similar to and has overlaps with, but is not synonymous with, identity politics....

The term ethnocentrism was coined by William G.