Open English Wordnet
Verbs
(v)stratifydivide society into social classes or castes“Income distribution often stratifies a society” (v)stratifyform layers or strata“The rock stratifies” (v)stratifydevelop different social levels, classes, or castes“Society stratifies when the income gap widens” (v)stratifyform, arrange, or deposit in layers“The fish are stratified in barrels”,
“The rock was stratified by the force of the water”,
“A statistician stratifies the list of names according to the addresses” (v)stratifyrender fertile and preserve by placing between layers of earth or sand“stratify seeds”