Stratum - Definition

n 1: one of several parallel layers of material arranged one on
top of another (such as a layer of tissue or cells in an
organism or a layer of sedimentary rock)
2: people having the same social, economic, or educational
status; "the working class"; "an emerging professional class"
[syn: class, stratum, social class, socio-economic
class]
3: an abstract place usually conceived as having depth; "a good
actor communicates on several levels"; "a simile has at least
two layers of meaning"; "the mind functions on many strata
simultaneously" [syn: level, layer, stratum]