<p><strong>Noun</strong></p><ul><li>the act or an instance of stratifying</li><li>a stratified state or appearance: the stratification of ancient ruins from eight different periods</li><li>Also called social stratification</li><li>Sociology: the hierarchical or vertical division of society according to rank, caste, or class: stratification of feudal society</li><li>Geology: formation of strata; deposition or occurrence in strata</li><li>a stratum</li></ul>