stratum: meaning and definitions

A horizontal layer of material, especially one of several parallel layers arranged one on top of another.

Geology A bed or layer of sedimentary rock having approximately the same composition throughout.

Any of the regions of the atmosphere, such as the troposphere, that occur as layers.

Biology A layer of tissue: the epithelial stratum.

A level of society composed of people with similar social, cultural, or economic status.

One of a number of layers, levels, or divisions in an organized system: a complex poem with many strata of meaning.