olemus
kihtideks jaotamine/jaotumine kontekstist sõltuvas tähenduses

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Wiktionary.
1. the process leading to the formation or deposition of layers, especially of sedimentary rocks
2. (music) a layering of musical texture
3. (ecology) the vertical layering of vegetation in a forest
4. (sociology) society's categorization of people into socioeconomic strata
https://en.wikipedia.org/wiki/Atmosphere_of_Earth#Stratification
https://en.wikipedia.org/wiki/Social_stratification