Pluralism and Diversity. A dictionary definition of pluralism is: Pluralism: a state of society in which members of diverse ethnic, racial, religious, or social groups maintain an autonomous participation in and development of their traditional culture or special interest, within the confines of a common civilisation.luralism: a state of society in which members of diverse ethnic, racial, religious, or social groups maintain an autonomous participation in and development of their traditional culture or special interest, within the confines of a common civilisation.