strat·i·fi·ca·tion /ˌstrætɪfɪˈkeɪʃən/ noun [countableC, uncountableU] 1 XXwhen society is divided into separate social classes 〔社会的〕分层,阶层形成 The Indian caste system is an example of social stratification. 印度的种姓制度是社会阶层化的一个例子。
—stratify /ˈstrætɪfaɪ/ verb [intransitiveI, transitiveT]