Pronunciation: (strat"u-fi-kā'shun),[key] —n. 1. the act or an instance of stratifying.
2. a stratified state or appearance: the stratification of ancient ruins from eight different periods. 3. Sociol.the hierarchical or vertical division of society according to rank, caste, or class: stratification of feudal society. 4. Geol. a. formation of strata; deposition or occurrence in strata.
b. a stratum.