verb. ['ˈstrætəˌfaɪ'] form layers or strata.
verb. ['ˈstrætəˌfaɪ'] divide society into social classes or castes.
verb. ['ˈstrætəˌfaɪ'] form, arrange, or deposit in layers.
verb. ['ˈstrætəˌfaɪ'] render fertile and preserve by placing between layers of earth or sand.
verb. ['ˈstrætəˌfaɪ'] develop different social levels, classes, or castes.