/ ˌstrætɪfɪˈkeɪʃn; NAmE / noun
[ U ] ( technical ) the division of sth into different layers or groups :
social stratification
/ ˌstrætɪfɪˈkeɪʃn; NAmE / noun
[ U ] ( technical ) the division of sth into different layers or groups :
social stratification
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005