4. a: a state of society in which members of diverse ethnic, racial, religious, or social groups maintain and develop their traditional culture or special interest within the confines of a common civilization b: a concept, doctrine, or policy advocating this state.. a: a state of society in which members of diverse ethnic, racial, religious, or social groups maintain and develop their traditional culture or special interest within the confines of a common civilization b: a concept, doctrine, or policy advocating this state.